From 3d819bf6b75f59a69934e50e3ca6aa5a8a37d392 Mon Sep 17 00:00:00 2001
From: Luke Hubmayer-Werner <ld.hubmayer-werner@gmail.com>
Date: Mon, 3 Dec 2018 19:04:45 +1030
Subject: [PATCH] Added full days 1-3 2018, full days 1-11 2015, first star day
 12 2015

---
 2015/day1-input  |    1 +
 2015/day1.py     |   12 +
 2015/day10.py    |   23 +
 2015/day11.py    |   48 ++
 2015/day12-input |    1 +
 2015/day12.py    |   15 +
 2015/day2-input  | 1000 +++++++++++++++++++++++++++++++++++
 2015/day2.py     |   17 +
 2015/day3-input  |    1 +
 2015/day3.py     |   47 ++
 2015/day4.py     |   15 +
 2015/day5-input  | 1000 +++++++++++++++++++++++++++++++++++
 2015/day5.py     |   34 ++
 2015/day6-input  |  300 +++++++++++
 2015/day6.py     |   33 ++
 2015/day7-input  |  339 ++++++++++++
 2015/day7.py     |   53 ++
 2015/day8-input  |  300 +++++++++++
 2015/day8.py     |   13 +
 2015/day9-input  |   28 +
 2015/day9.py     |   28 +
 2018/day1-input  | 1004 ++++++++++++++++++++++++++++++++++++
 2018/day1.py     |   13 +
 2018/day2-input  |  250 +++++++++
 2018/day2.py     |   34 ++
 2018/day3-input  | 1287 ++++++++++++++++++++++++++++++++++++++++++++++
 2018/day3.py     |   21 +
 27 files changed, 5917 insertions(+)
 create mode 100644 2015/day1-input
 create mode 100644 2015/day1.py
 create mode 100644 2015/day10.py
 create mode 100644 2015/day11.py
 create mode 100644 2015/day12-input
 create mode 100644 2015/day12.py
 create mode 100644 2015/day2-input
 create mode 100644 2015/day2.py
 create mode 100644 2015/day3-input
 create mode 100644 2015/day3.py
 create mode 100644 2015/day4.py
 create mode 100644 2015/day5-input
 create mode 100644 2015/day5.py
 create mode 100644 2015/day6-input
 create mode 100644 2015/day6.py
 create mode 100644 2015/day7-input
 create mode 100644 2015/day7.py
 create mode 100644 2015/day8-input
 create mode 100644 2015/day8.py
 create mode 100644 2015/day9-input
 create mode 100644 2015/day9.py
 create mode 100644 2018/day1-input
 create mode 100644 2018/day1.py
 create mode 100644 2018/day2-input
 create mode 100644 2018/day2.py
 create mode 100644 2018/day3-input
 create mode 100644 2018/day3.py

diff --git a/2015/day1-input b/2015/day1-input
new file mode 100644
index 0000000..71a7803
--- /dev/null
+++ b/2015/day1-input
@@ -0,0 +1 @@
+()(((()))(()()()((((()(((())(()(()((((((()(()(((())))((()(((()))((())(()((()()()()(((())(((((((())))()()(()(()(())(((((()()()((())(((((()()))))()(())(((())(())((((((())())))(()())))()))))()())()())((()()((()()()()(()((((((((()()())((()()(((((()(((())((())(()))()((((()((((((((())()((()())(())((()))())((((()())(((((((((((()()(((((()(()))())(((()(()))())((()(()())())())(()(((())(())())()()(()(()((()))((()))))((((()(((()))))((((()(()(()())())()(((()((((())((((()(((()()(())()()()())((()((((((()((()()))()((()))()(()()((())))(((()(((()))((()((()(()))(((()()(()(()()()))))()()(((()(((())())))))((()(((())()(()(())((()())))((((())))(()(()(()())()((()())))(((()((()(())()()((()((())(()()((())(())()))()))((()(())()))())(((((((()(()()(()(())())))))))(()((((((())((((())((())())(()()))))()(())(()())()())((())(()))))(()))(()((()))()(()((((((()()()()((((((((()(()(())((()()(()()))(())()())()((())))()))()())(((()))(())()(())()))()((()((()(()()())(())()()()((())())))((()()(()()((()(())()()())(((()(()()))))(())))(()(()())()))()()))))))()))))((((((())))())))(()(())())(()())))))(()))()))))))()((()))))()))))(()(()((()())())(()()))))(((())()))())())())(((()(()()))(())()(())(())((((((()()))))((()(()))))))(()))())(((()()(()))()())()()()())))))))))))))(())(()))(()))((()(())(()())(())())(()())(())()()(()())))()()()))(())())()))())())(())((())))))))(())))(())))))()))))((())(()(((()))))(()))()((()(())))(()())(((((()))()())()()))))()))))()))())(()(()()()))()))))))((()))))))))))()((()))((()(())((())()()(()()))()(()))))()()(()))()))(((())))(())()((())(())(()())()())())))))))())))()((())))()))(()))()()))(((((((()))())(()()))(()()(()))()(()((()())()))))))(((()()()())))(())()))()())(()()))()()))))))))(())))()))()()))))))()))()())))()(())(())))))()(())()()(()()))))())((()))))()))))(()(((((()))))))))())))())()(())()()))))(())))())()()())()()())()(()))))()))()))))))))())))((()))()))()))())))()())()()())))())))(()((())()((()))())))))())()(())((())))))))))))())()())(())())())(()))(()))()))())(()(())())()())()()(()))))(()(())))))))(())))())(())))))))())()()(())())())))(())))))()))()(()())()(()))())())))))()()(()))()))))())))))))))()))))()))))))())()())()()))))()())))())))))))))))()()))))()()(((()))()()(())()))))((()))))(()))(())())))(())()))))))(()))()))))(())())))))()))(()())))))))))))))())))))))))()((()())(()())))))))((()))))(())(())))()(()())())))())())(()()()())))()))))))())))))())()()())))))))))))()()(()))))()())()))((()())(()))))()(()))))))))))()())())(((())(()))))())()))()))()))))))()))))))(()))))()))))()(())))(())))(()))())()()(()()))()))(()()))))))))()))(()))())(()()(()(()())()()))()))))))))(())))))((()()(()))())())))))()))())(()())()()))())))()(()()()()))((())())))())()(()()))()))))))))(()))(())))()))))(()(()())(()))))()())())()))()()))())))))))))))())()))))))()))))))))())))))()))))())(()())))(())()))())())))))()()(()()())(()())))()()))(((()))(()()()))))()))))()))))((())))()((((((()()))))))())))))))))))(((()))))))))))))(())())))))())(()))))))(()))((()))())))()(()((()))()))()))))))))))())()))()(()()))))())))())(())()(()))()))())(()))()))))(()()))()()(())))))()))(())(()(()()))(()()())))))(((()))))))()))))))))))))(())(()))))()())())()()((()()))())))))(()))))())))))))()()()))))))))())))()(((()()))(())))))(((())())))))((()))()(()))(()))))(()())))(()))())))))()))))(())(())))()((()))(())())))()()))()))))))))()))(()()()(()()()(()))())(())()())(((()))(())))))))))(((()())))()()))))))))()(())(()))()((((())(())(()())))()))(((())()()()))((()))(()))())())))())))(()))())()())())(()(())())()()()(())))())(())))(())))(())()))()))(()((()))))))))())(()))))))())(()()))()()))()(()(()())))()()(()((()((((((()))(())))()()()))())()))((()()(()))())((()(()(()))(()()))))()())))()))()())))))))()()((()())(())))()))(()))(())(()))())(()(())))()()))))))(((()(((()()))()(()(())())((()()))()))()))()))()(()()()(()))((()())()(())))()()))(((())()()())(())()((()()()()(()(())(()()))()(((((()())))((())))))(()()()))))(((()(())))()))((()((()(())()(()((())))((()())()(()))(((()())()()(()))(())(((()((()())()((())()())(((()()))((()((())(()))(()())(()()()))((()))(())(()((()()())((()))(())))(())(())(())))(()())))(((((()(()(((((()())((((()(()())(())(()()(((())((()(((()()(((()()((((((())))())(()((((((()(()))()))()()((()((()))))()(()()(()((()()))))))(((((()(((((())()()()(())())))))))()))((()()(())))(())(()()()())))))(()((((())))))))()()(((()(()(()(()(()())()()()(((((((((()()())()(()))((()()()()()(((((((()())()((())()))((((((()(()(()(()())(((()(((((((()(((())(((((((((())(())())()))((()(()))(((()()())(())(()(()()(((()(())()))())))(())((((((())(()()())()()(((()(((())(()(((())(((((((()(((((((((()))(())(()(()(()))))((()))()(())())())((()(()((()()))((()()((()(())(())(()((())(((())(((()()()((((((()()(())((((())()))))(())((()(()((())))(((((()(()()())())((())())))((())((()((()()((((((())(((()()(()())())(()(()))(()(()))())())()(((((((()(((()(())()()((())((()(()()((()(()()(((((((((((())((())((((((())((()((((()(()((((()(((((((())()((()))))())()((()((((()(()(((()((()())))(())())(((()(((())((((((()(((((((((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\ No newline at end of file
diff --git a/2015/day1.py b/2015/day1.py
new file mode 100644
index 0000000..aab038b
--- /dev/null
+++ b/2015/day1.py
@@ -0,0 +1,12 @@
+with open('day1-input', 'r') as file:
+  data = file.readlines()
+print(data[0].count('(') - data[0].count(')'))  # Part 1
+f = 0
+for i, c in enumerate(data[0]):
+  if c == '(':
+    f += 1
+  else:
+    f -= 1
+  if f < 0:
+    print(i+1)  # Part 2
+    break
diff --git a/2015/day10.py b/2015/day10.py
new file mode 100644
index 0000000..cbab64b
--- /dev/null
+++ b/2015/day10.py
@@ -0,0 +1,23 @@
+data = '3113322113'
+
+def iterate(s):
+  lastchar = s[0]
+  lastcount = 1
+  output = []
+  for c in s[1:] + '\x00':
+    if c == lastchar:
+      lastcount += 1
+    else:
+      output += [str(lastcount), lastchar] # [lastchar]*lastcount
+      lastchar = c
+      lastcount = 1
+  return ''.join(output)
+
+s = data
+for i in range(40):
+  s = iterate(s)
+print(len(s))  # Part 1
+s2 = s
+for i in range(10):  # equivalent to 50 times from starting input. Doesn't really save time though.
+  s2 = iterate(s2)
+print(len(s2))  # Part 2
diff --git a/2015/day11.py b/2015/day11.py
new file mode 100644
index 0000000..875ae28
--- /dev/null
+++ b/2015/day11.py
@@ -0,0 +1,48 @@
+data = 'cqjxjnds'
+#import numpy as np
+#base26m = np.array([26**n for n in range(7, -1, -1)], dtype=np.int64)
+#def increment(s):
+  #digits = [ord(c)-97 for c in s]
+  #base26 = np.dot(base26m, digits)
+  #num = base26 + 1
+  #digits2 = []
+  #while num:
+    #digits2.append(num % 26)
+    #num //= 26
+  #digits2 += [0]*(8-len(digits2))
+  #return ''.join([chr(d+97) for d in reversed(digits2)])
+
+def increment(s):
+  if 'a' <= s[-1] < 'z':
+    inc = 2 if s[-1] in 'hnk' else 1
+    return s[:-1] + chr(ord(s[-1])+inc)
+  else:
+    return increment(s[:-1]) + 'a'
+
+def is_valid(s):
+  #if 'i' in s or 'o' in s or 'l' in s:
+    #return False
+  straight = False
+  for a, b, c in zip(s[:-2], s[1:-1], s[2:]):
+    if ord(a) == ord(b)-1 == ord(c)-2:
+      straight = True
+      break
+  if not straight:
+    return False
+  pairs = set()
+  for a, b in zip(s[:-1], s[1:]):
+    if a == b:
+      pairs.add(a)
+    if len(pairs) >= 2:
+      return True
+  return False
+
+password = increment(data)
+while not is_valid(password):
+  password = increment(password)
+print(password)  # Part 1  -- cqkkaabc is not correct?! - actually cqjxxyzz
+
+password2 = increment(password)
+while not is_valid(password2):
+  password2 = increment(password2)
+print(password2)  # Part 2
diff --git a/2015/day12-input b/2015/day12-input
new file mode 100644
index 0000000..87e5309
--- /dev/null
+++ b/2015/day12-input
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diff --git a/2015/day12.py b/2015/day12.py
new file mode 100644
index 0000000..b30b4de
--- /dev/null
+++ b/2015/day12.py
@@ -0,0 +1,15 @@
+import json
+number_sum = 0.0
+def parse_int(val):
+  i = int(val)
+  global number_sum
+  number_sum += i
+  return i
+def parse_float(val):
+  i = float(val)
+  global number_sum
+  number_sum += i
+  return i
+with open('day12-input', 'r') as file:
+  data = json.load(file, parse_float=parse_float, parse_int=parse_int)
+print(number_sum)  # Part 1
diff --git a/2015/day2-input b/2015/day2-input
new file mode 100644
index 0000000..b52434e
--- /dev/null
+++ b/2015/day2-input
@@ -0,0 +1,1000 @@
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diff --git a/2015/day2.py b/2015/day2.py
new file mode 100644
index 0000000..14820b8
--- /dev/null
+++ b/2015/day2.py
@@ -0,0 +1,17 @@
+with open('day2-input', 'r') as file:
+  data = [l.strip('\n') for l in file]
+dimensions = [[int(x) for x in d.split('x')] for d in data]
+
+def area(l, w, h):
+  sides = [l*w, w*h, h*l]
+  slack = min(sides)
+  return 2*sum(sides) + slack
+
+print(sum([area(*present) for present in dimensions]))  # Part 1
+
+def ribbon(l, w, h):
+  perimeter = 2 * (sum([l,w,h])-max([l,w,h]))
+  volume = l*w*h
+  return perimeter + volume
+
+print(sum([ribbon(*present) for present in dimensions]))  # Part 2
diff --git a/2015/day3-input b/2015/day3-input
new file mode 100644
index 0000000..783e28b
--- /dev/null
+++ b/2015/day3-input
@@ -0,0 +1 @@
+>^^v^<>v<<<v<v^>>v^^^<v<>^^><^<<^vv>>>^<<^>><vv<<v^<^^><>>><>v<><>^^<^^^<><>>vv>vv>v<<^>v<>^>v<v^<>v>><>^v<<<<v^vv^><v>v^>>>vv>v^^^<^^<>>v<^^v<>^<vv^^<^><<>^>><^<>>><><vv><>v<<<><><>v><<>^^^^v>>^>^<v<<vv^^<v<^<^>^^v^^^^^v<><^v><<><^v^>v<<>^<>^^v^<>v<v^>v>^^<vv^v><^<>^v<><^><v^><><><<<<>^vv^>^vvvvv><><^<vv^v^v>v<<^<^^v^<>^<vv><v<v^v<<v<<^^>>^^^v^>v<><^vv<<^<>v<v><><v^^><v<>^^>^^>v^>^<<<<v><v<<>v><^v>^>><v^^<^>v<vvvv<>>>>>^v^^>v<v<^<vv>^>^vv^>vv^^v<<^<^^<>v>vv^v>><>>>v^>^>^^v<>^<v<<>^vv>v^<<v>v<<><v>^vvv<v<vvv^v<vv<v^^^>v><<^<>><v^^>^v^>>^v<^<><v<>>v^<>>v<>>v^^^><^>>vvvv>^v<^><<>>^<>^>vv><v<<>>^^>v^^^><^<<^^v>v<^<<>v>^^vvv^v^>v^<>^^<>v^v>v>v<v^>vv>^^v<>v>>^<>><>v>v^<<vvvv<vvv><v^<^>^v<>>^><v>><>^<v>v<v>vv^>>vvv<>v>v<v^>>^>>v<<>^<>^<>>>^v<<<^<^v>vv^>><<><v^>^v^^^v<>^^vv><>><>>^>v^<v<>v<>>^<<^v>^^^<>^v^><>v<<v>vv^>vv<<>>><<^v^<>v<vv>>>^^<>^><<^>vv>>^<<v^^vv<>>><v>v><^<v<<>>>^^<>>^<^v><>vv^^^v>vvv>^><<>^^>^<<v^<v<^v<<>vvv<^<<>^>^v<vv<^>vvv>v>vv^<v^><>>^vv<^^^vv><^vv<v^<><v^vvv><<^>^^><v<<vv^>v<vv<v>^<>^v<<>v<v^v^>^>^>v<<^vvv<<<v>^^>^<<<<>vv>>^<>^>>>v<v>^^<v^<v<>>>vv>^^v<<>>>^^v><<<v<v<^v<>^^><v<^v<<v^><><^<><v<^^v>>><v^^v<<v^><^<><<v^>><^<>v>v^<><^<v>^v^>^>^vv^>^^<<vv^>vv<^vvv<>>^^<^>v^>^>^<v^><v<v>>>v<<<><^v<<><^<vv^v^^^>v<^^<v^vvv<v<><v<vv<^vv<>vv<v^<>>vvvvv<<>^v^v>vv>>>vvv^^<^<^<><>v<v>><^v><^<<<>><<<v>^>v<>^>^v>>^<>v^<^>><<>^<v>^>^^^>^^<v>>>><>^v^v><<<<vv^<vv<>vv>v<>v^<v^>v><>>>v^<><^vvv>vv^<^<<^<^^v>^>>>v<^<^v^^<^<^>>><v>vv>^<<><>^>>v>^<<>><^<>v<>vv^^>^>vvv^v<<^<^^<vv<>^vvv<^^v^vv^>>v<^>^^<v^<>v<^<^vv>v<<vv>vv>^>vvv>>>^^>v<>^v>v^<^>>v>^^v>>>>v^<v>v<^>v<v<<>>^v<^^<v><^<>>^<<vv^>>v<<v>^v<>><^>vv<v<^>>^^<vvvvvvvvv>>>v<v<>v^<>>^vv<v^^v<<^vvv^<<^><>vv<><<>>v>vv^><>>^^v^>>v^v^><<<>>^^<^v<<^<>>>>^<^>v^><<^>v<^v<^>>^^<<<<><^<^v^v<>>^v<^<<vv^<><^^vv><v^v^v>^>>^>^vv^>^v<v^v<<vvv^><>>^v^^><>v>vv><^>>vv<vvv<<<<^<>vvv^v<v>^<v<^>^<^<v<><>v^^^^<<vv<^^vv<v>><<v^><>>><v^>^v><^>^><vv^<><^<v>><<^vv<>>v^<<v<>v><v<><><vv>^>>v^<^<v>^><>>><^><v^v<>>>^^<^>v<v>vvv<>^<<><v^^>^>>v<^v>^>v>>>vv>v>>v^^^<^<vvv^<>^>^<v^<v^v>v>^>vv>vvv<>v<^>v>^^>>^<vv^^v>v^^^^^v^vv><^<><>^>vv<^>>^vvvv^^^>^<vv>^v<<^><^^>^<>^^>^<<v<^>>>^><<^^>v^v>>^>vvvv>^^v><v>>vv><<<vv<^>v>^^^<v>v^vvv<^><<^>^<>^><<<<<v^<<vv^v>^<>v<v>^>^>><>v^v<^vv^^>vv<<v^v>vv^vvv<<<<>^v<v^^v^v>v<<v>^^<>^vv^^>^>^v^vv^>>v^vv^^<vv><<v^v^^v><vv<^vvv<vv^^<<v>v^v^^^^v<^<^>v>^>v>^vv^v^^<v<^vvvv<<<>^<^^^<^^<>^<><vv<^^<<^>>><v^vvvv>^<>>^^>v^^v^<<v^^^<<<><^<v^v^^v<v^<>v><<v<>^v>v<^><^>vv^^<vvv<^v>>v>^<><v^><^^^<v^>>vv<<<<<^<>^v^v>^vv^<>v>v<^>vv<<^vv>vv<v<><>>v>><v<^<^^>><<v^v<<^><v<^<vv<v<<vv^>^<<><^^>^<^>>^<vv>><v<<vvv<^^v^>^^<^v>^v<v<>v><v^v^<<^<><<v<<^v>v<<>>^>v>>v>>v<^<<^<^>>>v>^^^v><^>^^>>v<<>^v><v>vvv^vv<<<>vvv<<>^>>>v<v<v^<^<^>^<^>v^^v<^^<v<>v<>>^^>^v^>v<<<<^<>v^><<<v>>>><<v^<^vv>v>><>>^<<<^<^^>v<>>v<>vv<<^<<><<^>v^^^vv^>vvvv>>v>v^><<v<>vv^<<><<vvv>^>>>^<<<^<^<<v>^>v<>>v>>vv^^><<<<^^^v>><<^><v><v^^><v<<v^^v^^v>>v<><><<>^><v><^<vv>><^v<>v<vvv<>^>><v>>v<^><<v>^<>^v><^><^^<v>^><^^v^<<><>>^>v^<^v^vv<><^>vv^>v^vvv^<>>^><^<^<>^<<v^v<^v><>^v<v>>^>>^v^vv>><vv><v^^<<^v^<>^v<<>^><^>><v>>v<<<v^^vv<>^^v>>><><><<v^<<<v^<^^><v^>v^^vv<v^<>>vv^<^v<>^v>>v^v>v<^^vv><>^v<<>v^<>v^>>v>vvv<^><><^^>^vv^>>v^>^<^^<><>><<>^^^><^v^v><<<><<^v^vv>v>><^>>><v^>v<v><><v^v<>v^^>>v<<>v>v<v<v<^^<><>v^^<>>v<^v<v>v<><v<v>^<<>v>vv^^<>>^^^<>^^>^v>v>>>^v^v><v^^<><v>^^v^v<^<^^><<v<^<^<>^<>><<>^>>^>^^><v><>v<><>><<<>>>>vv>>>^>>^v<^>v^^^v<<vv>><<<^<<<>>>>>^>vv<^v^<>^<v^>^v><v>vvv<>>>^v^^^v<<<<>>^^<vv<^<^^>^<>v<^<<<>><>>v<^<>^<vvv<^<>><><<v>^^^>^^<<v<v^>^^v^>><<^vv><v>^v>>^<v>v>^^>^v>^vvv<>v^v^^<><vv>vv^>>><>v<^><v<v^<><<<>^v>^v<<<^>^>^>v^v<<><vvv<<v^^<><v>^>>><vv>><v>>v^<vv>>vv<<^v^v<<><^v<vv>>>vv<>>>>^vv>v^<>vv>v^v<v^><v<^^^^^>vv<><<vvv^<v><^<vv><^^^vv^<>^^^^<^><^<>v^<v^v<<^v<<^^<>>^<v^^>>>vv<vvv<>v<<>><^vvv^<<^^<<>>>^<>>>v^^><>><<>><v^v>>>>>><>>><v^<<vvv^>v<>>v^<>vv<><^^^^v^<<^<v^vv><<^^>v<^vvv^v>>v>^>>v>^^><<v^<>v<>vv<^v^vv><v><<vv^v>>v^>>v<^^^>^><<v<>^><>v>>>vvv<v<vv<^>>^v<v>^<^^^^^v><>v><>v^v^v<v^vv^v>vvvv<>vv<<<vv<v<<>^<^>^^v^<<>^<v><^><v<v<><<>v^<<^<><vv>v<<^v>>^v<><v>^>>^^><>v^<^<vvv^>^>^<<<<>vv>^v^v<^^^<vv>><>^^<<v<^<^^>>>v^v<<^^^<v<v<^<>^v<v><v^vv^^v^^v^^<vv<>^<><vv^<^v^<<^><<vvv>^^<^^^<^v>^>^vv><<<^v<v>vv>v<>v^v<v^>v^>>>v^v<>^v<<>^vv>v>v>v^<^>v^^<^>^^^^vv>^^><^>vv^>>^^v>><<<<^><>v<>^<v<vv^>^^><<^><v>v^>^^<^>>><>><v^v<v^<v<vv^v^<<^<vvv>>><vv<^^>>^>^><<v^<>>v>v^v^^><<>vv^v>v^<v><^<>^^<^>v>^<><<<v>^<^<^>^>^>^^v^<<^^v^^<^<>><^>v>>^^<>^^^<<<<v^>^v<^vv>^<<<v<><<v<>vv>>>v><>>><>>v<<<vv><>^v>v<^>><^><><v<>^v^>^v>^v<<><<^<>>v>^><>^>><>><^<v^><v^^<><v><^^>^v^^<>v^<v^<^v<v^^^^^v^<<^>^^^<^v><>^^<<<><<<<<^^>v^vvvv>v<>>vv<^>^v^>v<^vv^v<<><<v>v^v>^^><><^<v^>v><vv><>>><<>^vv<>v>>v<^v>>>v<v>v>v>^vv<<>^^vv<v<^v^<v<v>vv<>^<^<vv<v^<^v^^><<>^>><^v>vv^^v<<^^><<>v^^<><><v^^<v^v>^>^>^>v<^<v>^v^^>v<>vvv<^v<v^v><<v^><<^^><^<<v^v^>v<>^>v><><v>^<v<v>^<^^^>^v<<><<><>vv>v^<>v^><v^v<v><><<v>v<vv><<v>>v>^<<<>vv>>vvv>^^vv^v^^<^^<>v^^<>v>>^^>^>^>v>><^>><>>^<<>><^>v<<<<<<<^v^v<v^<v^^>^<><<v<^>v^>v^vv<<^^vv^>>>>^<>v<^v<>v<vv<^>>v^vv>vv><vv<<^>v>><vv>>>vv^<<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\ No newline at end of file
diff --git a/2015/day3.py b/2015/day3.py
new file mode 100644
index 0000000..e324a3c
--- /dev/null
+++ b/2015/day3.py
@@ -0,0 +1,47 @@
+with open('day3-input', 'r') as file:
+  data = file.readlines()
+
+x = 0
+y = 0
+houses = set()
+houses.add((x, y))
+for c in data[0]:
+  if c == '>':
+    x += 1
+  elif c == '<':
+    x -= 1
+  elif c == '^':
+    y += 1
+  elif c == 'v':
+    y -= 1
+  houses.add((x, y))
+print(len(houses))  # Part 1
+
+x1 = 0
+y1 = 0
+x2 = 0
+y2 = 0
+houses2 = set()
+houses2.add((0, 0))
+for i, c in enumerate(data[0]):
+  if i%2:
+    if c == '>':
+      x1 += 1
+    elif c == '<':
+      x1 -= 1
+    elif c == '^':
+      y1 += 1
+    elif c == 'v':
+      y1 -= 1
+    houses2.add((x1, y1))
+  else:
+    if c == '>':
+      x2 += 1
+    elif c == '<':
+      x2 -= 1
+    elif c == '^':
+      y2 += 1
+    elif c == 'v':
+      y2 -= 1
+    houses2.add((x2, y2))
+print(len(houses2))  # Part 2
diff --git a/2015/day4.py b/2015/day4.py
new file mode 100644
index 0000000..e80bb82
--- /dev/null
+++ b/2015/day4.py
@@ -0,0 +1,15 @@
+data = 'yzbqklnj'
+from hashlib import md5
+i = 0
+while True:
+  i += 1
+  if md5(f'{data}{i}'.encode('utf-8')).hexdigest().startswith('00000'):
+    print(i)  # Part 1
+    break
+
+i -= 1  # Just in case the first hit was 6 zeros
+while True:
+  i += 1
+  if md5(f'{data}{i}'.encode('utf-8')).hexdigest().startswith('000000'):
+    print(i)  # Part 2
+    break
diff --git a/2015/day5-input b/2015/day5-input
new file mode 100644
index 0000000..a9b6e77
--- /dev/null
+++ b/2015/day5-input
@@ -0,0 +1,1000 @@
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diff --git a/2015/day5.py b/2015/day5.py
new file mode 100644
index 0000000..e3f391c
--- /dev/null
+++ b/2015/day5.py
@@ -0,0 +1,34 @@
+with open('day5-input', 'r') as file:
+  data = [l.strip('\n') for l in file]
+
+naughty_substrings = ['ab', 'cd', 'pq', 'xy']
+vowels = set(['a', 'e', 'i', 'o', 'u'])
+def is_nice(s):
+  for n in naughty_substrings:
+    if n in s:
+      return False
+  v_count = 0
+  rep_count = 0
+  last_char = ''
+  for c in s:
+    if c in vowels:
+      v_count += 1
+    if c == last_char:
+      rep_count += 1
+    last_char = c
+  return v_count >= 3 and rep_count > 0
+print(len([s for s in data if is_nice(s)]))  # Part 1
+
+def is_nice2(s):
+  spaced_rep = False
+  for a, b in zip(s[:-2], s[2:]):
+    if a == b:
+      spaced_rep = True
+      break
+  if not spaced_rep:
+    return False
+  for a, b in zip(s[:-1], s[1:]):
+    if s.count(a+b) > 1:
+      return True
+  return False
+print(len([s for s in data if is_nice2(s)]))  # Part 2
diff --git a/2015/day6-input b/2015/day6-input
new file mode 100644
index 0000000..c4357c6
--- /dev/null
+++ b/2015/day6-input
@@ -0,0 +1,300 @@
+turn on 887,9 through 959,629
+turn on 454,398 through 844,448
+turn off 539,243 through 559,965
+turn off 370,819 through 676,868
+turn off 145,40 through 370,997
+turn off 301,3 through 808,453
+turn on 351,678 through 951,908
+toggle 720,196 through 897,994
+toggle 831,394 through 904,860
+toggle 753,664 through 970,926
+turn off 150,300 through 213,740
+turn on 141,242 through 932,871
+toggle 294,259 through 474,326
+toggle 678,333 through 752,957
+toggle 393,804 through 510,976
+turn off 6,964 through 411,976
+turn off 33,572 through 978,590
+turn on 579,693 through 650,978
+turn on 150,20 through 652,719
+turn off 782,143 through 808,802
+turn off 240,377 through 761,468
+turn off 899,828 through 958,967
+turn on 613,565 through 952,659
+turn on 295,36 through 964,978
+toggle 846,296 through 969,528
+turn off 211,254 through 529,491
+turn off 231,594 through 406,794
+turn off 169,791 through 758,942
+turn on 955,440 through 980,477
+toggle 944,498 through 995,928
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+toggle 521,303 through 617,366
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+toggle 391,87 through 499,792
+toggle 562,527 through 668,935
+turn off 68,358 through 857,453
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+turn off 666,61 through 768,87
+turn on 27,501 through 921,952
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+turn off 64,253 through 655,960
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+turn off 59,119 through 699,734
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+toggle 561,947 through 638,965
+turn on 368,458 through 437,612
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+toggle 916,242 through 926,786
+toggle 522,272 through 773,314
+turn on 432,897 through 440,954
+turn off 132,169 through 775,380
+toggle 52,205 through 693,747
+toggle 926,309 through 976,669
+turn off 838,342 through 938,444
+turn on 144,431 through 260,951
+toggle 780,318 through 975,495
+turn off 185,412 through 796,541
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+turn on 294,132 through 460,338
+turn on 823,500 through 899,529
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+toggle 717,493 through 930,875
+toggle 534,948 through 599,968
+turn on 522,730 through 968,950
+turn off 102,229 through 674,529
diff --git a/2015/day6.py b/2015/day6.py
new file mode 100644
index 0000000..3e1a4a7
--- /dev/null
+++ b/2015/day6.py
@@ -0,0 +1,33 @@
+with open('day6-input', 'r') as file:
+  data = [l.strip('\n') for l in file]
+import numpy as np
+lights = np.zeros((1000,1000), dtype=np.int8)
+
+for line in data:
+  tokens = line.split(' ')
+  x1, y1 = [int(i) for i in tokens[-3].split(',')]
+  x2, y2 = [int(i)+1 for i in tokens[-1].split(',')]  # inclusive
+  if tokens[0] == 'toggle':
+    lights[x1:x2, y1:y2] ^= 1
+  else:  # elif tokens[0] == 'turn':
+    if tokens[1] == 'on':
+      lights[x1:x2, y1:y2] = 1
+    else:  # Off
+      lights[x1:x2, y1:y2] = 0
+print(np.sum(lights))  # Part 1
+
+lights2 = np.zeros((1000,1000), dtype=np.int32)
+
+for line in data:
+  tokens = line.split(' ')
+  x1, y1 = [int(i) for i in tokens[-3].split(',')]
+  x2, y2 = [int(i)+1 for i in tokens[-1].split(',')]  # inclusive
+  if tokens[0] == 'toggle':
+    lights2[x1:x2, y1:y2] += 2
+  else:  # elif tokens[0] == 'turn':
+    if tokens[1] == 'on':
+      lights2[x1:x2, y1:y2] += 1
+    else:  # Off
+      lights2[x1:x2, y1:y2] -= 1
+      np.clip(lights2[x1:x2, y1:y2], 0, None, out=lights2[x1:x2, y1:y2])
+print(np.sum(lights2))  # Part 2
diff --git a/2015/day7-input b/2015/day7-input
new file mode 100644
index 0000000..0fd2859
--- /dev/null
+++ b/2015/day7-input
@@ -0,0 +1,339 @@
+lf AND lq -> ls
+iu RSHIFT 1 -> jn
+bo OR bu -> bv
+gj RSHIFT 1 -> hc
+et RSHIFT 2 -> eu
+bv AND bx -> by
+is OR it -> iu
+b OR n -> o
+gf OR ge -> gg
+NOT kt -> ku
+ea AND eb -> ed
+kl OR kr -> ks
+hi AND hk -> hl
+au AND av -> ax
+lf RSHIFT 2 -> lg
+dd RSHIFT 3 -> df
+eu AND fa -> fc
+df AND dg -> di
+ip LSHIFT 15 -> it
+NOT el -> em
+et OR fe -> ff
+fj LSHIFT 15 -> fn
+t OR s -> u
+ly OR lz -> ma
+ko AND kq -> kr
+NOT fx -> fy
+et RSHIFT 1 -> fm
+eu OR fa -> fb
+dd RSHIFT 2 -> de
+NOT go -> gp
+kb AND kd -> ke
+hg OR hh -> hi
+jm LSHIFT 1 -> kg
+NOT cn -> co
+jp RSHIFT 2 -> jq
+jp RSHIFT 5 -> js
+1 AND io -> ip
+eo LSHIFT 15 -> es
+1 AND jj -> jk
+g AND i -> j
+ci RSHIFT 3 -> ck
+gn AND gp -> gq
+fs AND fu -> fv
+lj AND ll -> lm
+jk LSHIFT 15 -> jo
+iu RSHIFT 3 -> iw
+NOT ii -> ij
+1 AND cc -> cd
+bn RSHIFT 3 -> bp
+NOT gw -> gx
+NOT ft -> fu
+jn OR jo -> jp
+iv OR jb -> jc
+hv OR hu -> hw
+19138 -> b
+gj RSHIFT 5 -> gm
+hq AND hs -> ht
+dy RSHIFT 1 -> er
+ao OR an -> ap
+ld OR le -> lf
+bk LSHIFT 1 -> ce
+bz AND cb -> cc
+bi LSHIFT 15 -> bm
+il AND in -> io
+af AND ah -> ai
+as RSHIFT 1 -> bl
+lf RSHIFT 3 -> lh
+er OR es -> et
+NOT ax -> ay
+ci RSHIFT 1 -> db
+et AND fe -> fg
+lg OR lm -> ln
+k AND m -> n
+hz RSHIFT 2 -> ia
+kh LSHIFT 1 -> lb
+NOT ey -> ez
+NOT di -> dj
+dz OR ef -> eg
+lx -> a
+NOT iz -> ja
+gz LSHIFT 15 -> hd
+ce OR cd -> cf
+fq AND fr -> ft
+at AND az -> bb
+ha OR gz -> hb
+fp AND fv -> fx
+NOT gb -> gc
+ia AND ig -> ii
+gl OR gm -> gn
+0 -> c
+NOT ca -> cb
+bn RSHIFT 1 -> cg
+c LSHIFT 1 -> t
+iw OR ix -> iy
+kg OR kf -> kh
+dy OR ej -> ek
+km AND kn -> kp
+NOT fc -> fd
+hz RSHIFT 3 -> ib
+NOT dq -> dr
+NOT fg -> fh
+dy RSHIFT 2 -> dz
+kk RSHIFT 2 -> kl
+1 AND fi -> fj
+NOT hr -> hs
+jp RSHIFT 1 -> ki
+bl OR bm -> bn
+1 AND gy -> gz
+gr AND gt -> gu
+db OR dc -> dd
+de OR dk -> dl
+as RSHIFT 5 -> av
+lf RSHIFT 5 -> li
+hm AND ho -> hp
+cg OR ch -> ci
+gj AND gu -> gw
+ge LSHIFT 15 -> gi
+e OR f -> g
+fp OR fv -> fw
+fb AND fd -> fe
+cd LSHIFT 15 -> ch
+b RSHIFT 1 -> v
+at OR az -> ba
+bn RSHIFT 2 -> bo
+lh AND li -> lk
+dl AND dn -> do
+eg AND ei -> ej
+ex AND ez -> fa
+NOT kp -> kq
+NOT lk -> ll
+x AND ai -> ak
+jp OR ka -> kb
+NOT jd -> je
+iy AND ja -> jb
+jp RSHIFT 3 -> jr
+fo OR fz -> ga
+df OR dg -> dh
+gj RSHIFT 2 -> gk
+gj OR gu -> gv
+NOT jh -> ji
+ap LSHIFT 1 -> bj
+NOT ls -> lt
+ir LSHIFT 1 -> jl
+bn AND by -> ca
+lv LSHIFT 15 -> lz
+ba AND bc -> bd
+cy LSHIFT 15 -> dc
+ln AND lp -> lq
+x RSHIFT 1 -> aq
+gk OR gq -> gr
+NOT kx -> ky
+jg AND ji -> jj
+bn OR by -> bz
+fl LSHIFT 1 -> gf
+bp OR bq -> br
+he OR hp -> hq
+et RSHIFT 5 -> ew
+iu RSHIFT 2 -> iv
+gl AND gm -> go
+x OR ai -> aj
+hc OR hd -> he
+lg AND lm -> lo
+lh OR li -> lj
+da LSHIFT 1 -> du
+fo RSHIFT 2 -> fp
+gk AND gq -> gs
+bj OR bi -> bk
+lf OR lq -> lr
+cj AND cp -> cr
+hu LSHIFT 15 -> hy
+1 AND bh -> bi
+fo RSHIFT 3 -> fq
+NOT lo -> lp
+hw LSHIFT 1 -> iq
+dd RSHIFT 1 -> dw
+dt LSHIFT 15 -> dx
+dy AND ej -> el
+an LSHIFT 15 -> ar
+aq OR ar -> as
+1 AND r -> s
+fw AND fy -> fz
+NOT im -> in
+et RSHIFT 3 -> ev
+1 AND ds -> dt
+ec AND ee -> ef
+NOT ak -> al
+jl OR jk -> jm
+1 AND en -> eo
+lb OR la -> lc
+iu AND jf -> jh
+iu RSHIFT 5 -> ix
+bo AND bu -> bw
+cz OR cy -> da
+iv AND jb -> jd
+iw AND ix -> iz
+lf RSHIFT 1 -> ly
+iu OR jf -> jg
+NOT dm -> dn
+lw OR lv -> lx
+gg LSHIFT 1 -> ha
+lr AND lt -> lu
+fm OR fn -> fo
+he RSHIFT 3 -> hg
+aj AND al -> am
+1 AND kz -> la
+dy RSHIFT 5 -> eb
+jc AND je -> jf
+cm AND co -> cp
+gv AND gx -> gy
+ev OR ew -> ex
+jp AND ka -> kc
+fk OR fj -> fl
+dy RSHIFT 3 -> ea
+NOT bs -> bt
+NOT ag -> ah
+dz AND ef -> eh
+cf LSHIFT 1 -> cz
+NOT cv -> cw
+1 AND cx -> cy
+de AND dk -> dm
+ck AND cl -> cn
+x RSHIFT 5 -> aa
+dv LSHIFT 1 -> ep
+he RSHIFT 2 -> hf
+NOT bw -> bx
+ck OR cl -> cm
+bp AND bq -> bs
+as OR bd -> be
+he AND hp -> hr
+ev AND ew -> ey
+1 AND lu -> lv
+kk RSHIFT 3 -> km
+b AND n -> p
+NOT kc -> kd
+lc LSHIFT 1 -> lw
+km OR kn -> ko
+id AND if -> ig
+ih AND ij -> ik
+jr AND js -> ju
+ci RSHIFT 5 -> cl
+hz RSHIFT 1 -> is
+1 AND ke -> kf
+NOT gs -> gt
+aw AND ay -> az
+x RSHIFT 2 -> y
+ab AND ad -> ae
+ff AND fh -> fi
+ci AND ct -> cv
+eq LSHIFT 1 -> fk
+gj RSHIFT 3 -> gl
+u LSHIFT 1 -> ao
+NOT bb -> bc
+NOT hj -> hk
+kw AND ky -> kz
+as AND bd -> bf
+dw OR dx -> dy
+br AND bt -> bu
+kk AND kv -> kx
+ep OR eo -> eq
+he RSHIFT 1 -> hx
+ki OR kj -> kk
+NOT ju -> jv
+ek AND em -> en
+kk RSHIFT 5 -> kn
+NOT eh -> ei
+hx OR hy -> hz
+ea OR eb -> ec
+s LSHIFT 15 -> w
+fo RSHIFT 1 -> gh
+kk OR kv -> kw
+bn RSHIFT 5 -> bq
+NOT ed -> ee
+1 AND ht -> hu
+cu AND cw -> cx
+b RSHIFT 5 -> f
+kl AND kr -> kt
+iq OR ip -> ir
+ci RSHIFT 2 -> cj
+cj OR cp -> cq
+o AND q -> r
+dd RSHIFT 5 -> dg
+b RSHIFT 2 -> d
+ks AND ku -> kv
+b RSHIFT 3 -> e
+d OR j -> k
+NOT p -> q
+NOT cr -> cs
+du OR dt -> dv
+kf LSHIFT 15 -> kj
+NOT ac -> ad
+fo RSHIFT 5 -> fr
+hz OR ik -> il
+jx AND jz -> ka
+gh OR gi -> gj
+kk RSHIFT 1 -> ld
+hz RSHIFT 5 -> ic
+as RSHIFT 2 -> at
+NOT jy -> jz
+1 AND am -> an
+ci OR ct -> cu
+hg AND hh -> hj
+jq OR jw -> jx
+v OR w -> x
+la LSHIFT 15 -> le
+dh AND dj -> dk
+dp AND dr -> ds
+jq AND jw -> jy
+au OR av -> aw
+NOT bf -> bg
+z OR aa -> ab
+ga AND gc -> gd
+hz AND ik -> im
+jt AND jv -> jw
+z AND aa -> ac
+jr OR js -> jt
+hb LSHIFT 1 -> hv
+hf OR hl -> hm
+ib OR ic -> id
+fq OR fr -> fs
+cq AND cs -> ct
+ia OR ig -> ih
+dd OR do -> dp
+d AND j -> l
+ib AND ic -> ie
+as RSHIFT 3 -> au
+be AND bg -> bh
+dd AND do -> dq
+NOT l -> m
+1 AND gd -> ge
+y AND ae -> ag
+fo AND fz -> gb
+NOT ie -> if
+e AND f -> h
+x RSHIFT 3 -> z
+y OR ae -> af
+hf AND hl -> hn
+NOT h -> i
+NOT hn -> ho
+he RSHIFT 5 -> hh
diff --git a/2015/day7.py b/2015/day7.py
new file mode 100644
index 0000000..2634507
--- /dev/null
+++ b/2015/day7.py
@@ -0,0 +1,53 @@
+with open('day7-input', 'r') as file:
+  data = [l.strip('\n') for l in file]
+
+bin_ops = {'AND': int.__and__, 'OR': int.__or__, 'RSHIFT': int.__rshift__, 'LSHIFT': int.__lshift__}
+
+class dict_int_giver(dict):
+  def __init__(self, kvs=[], readonly=None):
+    super().__init__(kvs)
+    self.readonly = set()
+    if readonly:
+      self.readonly = set(readonly)
+  def __getitem__(self, key):
+    try:
+      return int(key.replace(',', ''))
+    except ValueError:
+      return dict.get(self, key, None)
+  def __setitem__(self, key, value):
+    if key in self.readonly:
+      return
+    dict.__setitem__(self, key, value)
+
+def run_circuit(identifiers):
+  queue = [line for line in data]
+  while queue:
+    line = queue.pop(0)
+    tokens = line.split(' ')
+    output = tokens[-1]
+    input = tokens[:-2]
+    if len(input) == 1:  # Can only be a -> b
+      i = identifiers[input[0]]
+      if i is not None:
+        identifiers[output] = i
+      else:
+        queue.append(line)
+    elif len(input) == 2:  # Can only be NOT a -> b. a must be identifier.
+      if input[1] in identifiers:
+        identifiers[output] = identifiers[input[1]] ^ 0xFFFF  # 16bit values
+      else:
+        queue.append(line)
+    elif len(input) == 3:  # Can be any of the binary operators
+      i = identifiers[input[0]]
+      j = identifiers[input[2]]
+      if i is not None and j is not None:
+        identifiers[output] = bin_ops[input[1]](i, j) & 0xFFFF
+      else:
+        queue.append(line)
+
+identifiers_1 = dict_int_giver()
+run_circuit(identifiers_1)
+print(identifiers_1['a'])  # Part 1
+identifiers_2 = dict_int_giver([ ['b', identifiers_1['a'] ] ], ['b'])
+run_circuit(identifiers_2)
+print(identifiers_2['a'])  # Part 2
diff --git a/2015/day8-input b/2015/day8-input
new file mode 100644
index 0000000..3e5be65
--- /dev/null
+++ b/2015/day8-input
@@ -0,0 +1,300 @@
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+"oliaggtqyyx"
+"fwwnpmbb"
+"yrtdrieazfxyyneo"
+"nywbv\\"
+"twc\\ehfqxhgomgrgwpxyzmnkioj"
+"qludrkkvljljd\\xvdeum\x4e"
diff --git a/2015/day8.py b/2015/day8.py
new file mode 100644
index 0000000..13f6c6d
--- /dev/null
+++ b/2015/day8.py
@@ -0,0 +1,13 @@
+with open('day8-input', 'r') as file:
+  data = [l.strip('\n') for l in file]
+
+count = 0
+for line in data:
+  count += len(line) - len(line.encode('utf-8').decode('unicode-escape')) + 2  # Overall quotes aren't removed by encoding
+print(count)  # Part 1
+
+import json
+count2 = 0
+for line in data:
+  count2 += len(json.dumps(line)) - len(line)
+print(count2)  # Part 2
diff --git a/2015/day9-input b/2015/day9-input
new file mode 100644
index 0000000..9850564
--- /dev/null
+++ b/2015/day9-input
@@ -0,0 +1,28 @@
+Faerun to Norrath = 129
+Faerun to Tristram = 58
+Faerun to AlphaCentauri = 13
+Faerun to Arbre = 24
+Faerun to Snowdin = 60
+Faerun to Tambi = 71
+Faerun to Straylight = 67
+Norrath to Tristram = 142
+Norrath to AlphaCentauri = 15
+Norrath to Arbre = 135
+Norrath to Snowdin = 75
+Norrath to Tambi = 82
+Norrath to Straylight = 54
+Tristram to AlphaCentauri = 118
+Tristram to Arbre = 122
+Tristram to Snowdin = 103
+Tristram to Tambi = 49
+Tristram to Straylight = 97
+AlphaCentauri to Arbre = 116
+AlphaCentauri to Snowdin = 12
+AlphaCentauri to Tambi = 18
+AlphaCentauri to Straylight = 91
+Arbre to Snowdin = 129
+Arbre to Tambi = 53
+Arbre to Straylight = 40
+Snowdin to Tambi = 15
+Snowdin to Straylight = 99
+Tambi to Straylight = 70
diff --git a/2015/day9.py b/2015/day9.py
new file mode 100644
index 0000000..6575e63
--- /dev/null
+++ b/2015/day9.py
@@ -0,0 +1,28 @@
+with open('day9-input', 'r') as file:
+  data = [l.strip('\n') for l in file]
+
+towns = set()
+distances = {}
+def get_distance(town1, town2):
+  if town2 < town1:
+    return distances[(town2, town1)]
+  else:
+    return distances[(town1, town2)]
+def set_distance(town1, town2, value):
+  if town2 < town1:
+    distances[(town2, town1)] = value
+  else:
+    distances[(town1, town2)] = value
+
+for line in data:
+  town1, _, town2, _, distance = line.split(' ')
+  towns.add(town1)
+  towns.add(town2)
+  set_distance(town1, town2, int(distance))
+
+from itertools import permutations
+route_distances = []
+for route in permutations(towns):
+  route_distances.append(sum([get_distance(a, b) for a, b in zip(route[:-1], route[1:])]))
+print(min(route_distances))  # Part 1
+print(max(route_distances))  # Part 2
diff --git a/2018/day1-input b/2018/day1-input
new file mode 100644
index 0000000..de8f921
--- /dev/null
+++ b/2018/day1-input
@@ -0,0 +1,1004 @@
++1
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diff --git a/2018/day1.py b/2018/day1.py
new file mode 100644
index 0000000..5c58065
--- /dev/null
+++ b/2018/day1.py
@@ -0,0 +1,13 @@
+with open('day1-input', 'r') as file:
+  data = file.readlines()
+nums = [int(d.rstrip('\n')) for d in data]
+print(sum(nums))  # Part 1 answer
+
+from itertools import cycle
+iterator = cycle(nums)
+while(True):
+  f += next(iterator)
+  if f in freqs:
+    print(f)  # Part 2 answer
+    break
+  freqs.add(f)
diff --git a/2018/day2-input b/2018/day2-input
new file mode 100644
index 0000000..077f200
--- /dev/null
+++ b/2018/day2-input
@@ -0,0 +1,250 @@
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diff --git a/2018/day2.py b/2018/day2.py
new file mode 100644
index 0000000..faf169f
--- /dev/null
+++ b/2018/day2.py
@@ -0,0 +1,34 @@
+with open('day2-input') as file:
+  data = file.readlines()
+lines = [d.rstrip('\n') for d in data]
+twos = 0
+threes = 0
+for line in lines:
+  charcounts = {}
+  for c in line:
+    if c in charcounts:
+      charcounts[c] += 1
+    else:
+      charcounts[c] = 1
+  if 2 in charcounts.values():
+    twos += 1
+  if 3 in charcounts.values():
+    threes += 1
+print(twos * threes)  # Part 1
+
+def diff(s1, s2):
+  count = 0
+  common = []
+  for c1, c2 in zip(s1, s2):
+    if c1 != c2:
+      count += 1
+    else:
+      common.append(c1)
+  return count, common
+
+for i, line in enumerate(lines):
+  for line2 in lines[i:]:
+    count, common = diff(line, line2)
+    if count == 1:
+      print(line, line2, ''.join(common))  # Part 2
+      break
diff --git a/2018/day3-input b/2018/day3-input
new file mode 100644
index 0000000..e74ab81
--- /dev/null
+++ b/2018/day3-input
@@ -0,0 +1,1287 @@
+#1 @ 49,222: 19x20
+#2 @ 162,876: 28x29
+#3 @ 28,156: 17x18
+#4 @ 673,337: 24x24
+#5 @ 213,834: 20x23
+#6 @ 675,523: 20x13
+#7 @ 97,7: 11x27
+#8 @ 92,512: 11x17
+#9 @ 507,525: 27x20
+#10 @ 47,742: 21x25
+#11 @ 154,740: 28x25
+#12 @ 808,793: 28x24
+#13 @ 249,936: 13x11
+#14 @ 93,400: 8x9
+#15 @ 295,894: 17x22
+#16 @ 535,885: 8x5
+#17 @ 878,268: 13x11
+#18 @ 152,685: 28x24
+#19 @ 152,639: 22x26
+#20 @ 905,560: 23x27
+#21 @ 962,104: 19x12
+#22 @ 125,145: 19x22
+#23 @ 260,488: 13x21
+#24 @ 179,815: 12x24
+#25 @ 661,595: 4x6
+#26 @ 584,97: 10x15
+#27 @ 869,842: 11x19
+#28 @ 491,825: 19x25
+#29 @ 639,935: 10x28
+#30 @ 583,26: 11x13
+#31 @ 956,264: 22x17
+#32 @ 168,706: 22x21
+#33 @ 10,81: 29x18
+#34 @ 751,214: 16x21
+#35 @ 830,200: 17x20
+#36 @ 587,580: 18x20
+#37 @ 749,587: 10x13
+#38 @ 546,376: 28x25
+#39 @ 222,945: 11x28
+#40 @ 43,937: 14x27
+#41 @ 53,108: 25x21
+#42 @ 669,894: 28x28
+#43 @ 598,390: 23x25
+#44 @ 440,136: 24x28
+#45 @ 657,50: 16x13
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+#55 @ 545,884: 10x3
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+#58 @ 813,292: 17x24
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+#60 @ 582,397: 18x19
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+#62 @ 874,701: 12x10
+#63 @ 57,682: 10x18
+#64 @ 450,510: 11x28
+#65 @ 820,700: 27x17
+#66 @ 231,114: 13x15
+#67 @ 434,283: 22x18
+#68 @ 489,743: 23x28
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+#70 @ 297,896: 23x29
+#71 @ 240,664: 13x29
+#72 @ 96,953: 26x28
+#73 @ 520,21: 21x25
+#74 @ 878,207: 16x21
+#75 @ 31,408: 19x26
+#76 @ 846,419: 6x19
+#77 @ 754,602: 17x29
+#78 @ 95,621: 27x27
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+#80 @ 915,362: 27x22
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+#82 @ 41,58: 11x26
+#83 @ 242,800: 27x21
+#84 @ 525,652: 15x26
+#85 @ 507,865: 18x26
+#86 @ 855,272: 29x28
+#87 @ 343,718: 12x13
+#88 @ 405,628: 18x28
+#89 @ 479,608: 20x13
+#90 @ 752,934: 26x24
+#91 @ 25,99: 14x12
+#92 @ 909,952: 25x26
+#93 @ 425,523: 27x12
+#94 @ 345,586: 29x27
+#95 @ 642,240: 16x10
+#96 @ 369,567: 26x24
+#97 @ 483,770: 23x10
+#98 @ 745,683: 27x19
+#99 @ 601,817: 16x21
+#100 @ 793,153: 13x23
+#101 @ 388,65: 15x20
+#102 @ 66,971: 10x24
+#103 @ 236,487: 25x21
+#104 @ 661,56: 13x14
+#105 @ 839,545: 16x16
+#106 @ 215,222: 23x22
+#107 @ 242,816: 26x23
+#108 @ 213,402: 26x15
+#109 @ 676,223: 21x22
+#110 @ 297,445: 15x21
+#111 @ 249,885: 27x28
+#112 @ 300,213: 10x12
+#113 @ 936,598: 22x11
+#114 @ 755,384: 13x19
+#115 @ 715,109: 15x11
+#116 @ 636,97: 18x20
+#117 @ 443,669: 27x19
+#118 @ 710,106: 16x20
+#119 @ 209,520: 16x28
+#120 @ 26,770: 12x23
+#121 @ 491,482: 12x11
+#122 @ 949,666: 10x27
+#123 @ 804,834: 13x22
+#124 @ 959,831: 17x24
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+#126 @ 822,113: 29x29
+#127 @ 937,555: 28x25
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+#148 @ 339,787: 11x10
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+#150 @ 813,609: 16x10
+#151 @ 56,9: 18x22
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+#153 @ 570,702: 11x24
+#154 @ 692,588: 19x29
+#155 @ 516,568: 12x27
+#156 @ 939,720: 25x16
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+#173 @ 542,931: 13x23
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+#175 @ 437,16: 19x11
+#176 @ 688,883: 21x10
+#177 @ 3,630: 21x21
+#178 @ 943,128: 16x11
+#179 @ 970,90: 13x14
+#180 @ 816,501: 13x26
+#181 @ 232,138: 25x16
+#182 @ 356,500: 16x16
+#183 @ 920,824: 12x17
+#184 @ 116,442: 18x12
+#185 @ 971,642: 11x25
+#186 @ 508,187: 19x22
+#187 @ 46,15: 24x27
+#188 @ 958,121: 13x12
+#189 @ 287,850: 18x21
+#190 @ 564,326: 26x11
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+#193 @ 160,931: 29x13
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+#201 @ 597,536: 11x14
+#202 @ 721,111: 4x5
+#203 @ 412,541: 10x14
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+#205 @ 635,359: 25x20
+#206 @ 163,522: 17x11
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+#209 @ 943,313: 25x22
+#210 @ 117,966: 19x27
+#211 @ 302,703: 19x15
+#212 @ 897,123: 14x17
+#213 @ 510,574: 11x10
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+#215 @ 712,809: 15x15
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+#400 @ 499,149: 19x21
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+#403 @ 689,905: 12x19
+#404 @ 894,65: 29x28
+#405 @ 800,568: 23x14
+#406 @ 881,146: 12x24
+#407 @ 171,278: 18x12
+#408 @ 645,845: 20x17
+#409 @ 398,144: 23x13
+#410 @ 592,537: 10x10
+#411 @ 621,814: 14x12
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+#413 @ 719,294: 12x19
+#414 @ 724,112: 16x29
+#415 @ 652,593: 28x14
+#416 @ 930,660: 6x3
+#417 @ 77,324: 23x19
+#418 @ 153,187: 21x25
+#419 @ 286,205: 16x19
+#420 @ 865,287: 14x19
+#421 @ 437,619: 29x16
+#422 @ 162,852: 28x12
+#423 @ 619,35: 11x15
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diff --git a/2018/day3.py b/2018/day3.py
new file mode 100644
index 0000000..6b4d1df
--- /dev/null
+++ b/2018/day3.py
@@ -0,0 +1,21 @@
+with open('day3-input', 'r') as file:
+  data = [l.strip('\n') for l in file]
+
+import numpy as np
+fabric = np.zeros((1000, 1000), dtype=np.int32)
+
+for line in data:
+  tokens = line.split(' ')
+  w, h = [int(i) for i in tokens[-1].split('x')]
+  x, y = [int(i) for i in tokens[-2].rstrip(':').split(',')]
+  fabric[x:x+w, y:y+h] += 1
+
+print((fabric > 1).sum())  # Part 1
+
+for line in data:
+  tokens = line.split(' ')
+  w, h = [int(i) for i in tokens[-1].split('x')]
+  x, y = [int(i) for i in tokens[-2].rstrip(':').split(',')]
+  if fabric[x:x+w, y:y+h].sum() == w*h:
+    print(tokens[0])  # Part 2
+    break