2022 Day 25 part 1 python

2022/day25.py

@@ -0,0 +1,26 @@
+from helpers import *
+lines = read_day(25).split('\n')
+snafu_digits = {'=':-2, '-':-1, '0':0, '1':1, '2':2}
+# minimal_snafus = [-2]
+# for i in range(1, 50):
+# 	minimal_snafus.append(minimal_snafus[-1] + (-2 * (5**i)))
+# print(minimal_snafus)
+
+def snafu_to_decimal(s: str) -> int:
+	return sum((snafu_digits[v] * (5**i) for i,v in enumerate(reversed(s))))
+
+def decimal_to_snafu(i: int) -> str:
+	# We don't want to constantly flip addition/subtraction, so start with biggest number and subtract
+	digits = 0
+	maximal = 0
+	while i > maximal:
+		maximal += 2 * (5**digits)
+		digits += 1
+	base5 = np.base_repr(maximal-i, 5)
+	s = ['2'] * digits
+	for i,d in enumerate(reversed(base5)):
+		s[i] = {'0':'2', '1':'1', '2':'0', '3':'-', '4':'='}[d]
+	return ''.join(reversed(s))
+
+# print(decimal_to_snafu(1747))
+print(f'Part 1: {decimal_to_snafu(sum((snafu_to_decimal(l) for l in lines)))}')

2022/input/25

@@ -0,0 +1,124 @@
+21-0==1=-0
+102211-220011-----
+1=2=111=10=-
+12-2=022=2
+1=--=11
+12-2211000=0011-0-
+1=1-
+2=0-10-=21-2
+1210-
+2=1-=
+1=0=12=2112--11=
+2--211=200
+20-02-20
+12=12=0=0=1
+22===21=-0102-012=
+1--=-121
+1=02=2-=
+12-0-20
+2=---=0102--00=22
+1=2==0=2=
+11-1112
+2--012
+12=12=--212-0-==-02
+1=220
+20===1
+2210-02=12-022-=1-
+22--1-==1
+211-1=1=0-==1
+10
+1-1-02
+1=-2==-0=21
+1=102
+20121021
+1=2=22=001200-==1020
+10211-1-20--10-1=
+1222==1--=1--11-=
+11211211
+1=101-20=
+1=1-11=0=000
+1=-=101
+2
+1000-2
+1==0=210=1=21222-=2
+1=1==2-
+2--020=2=2===-
+2-
+2=0
+222101=22=-21=11
+2=
+121201-0-20-2-=11=
+10=
+1212=20=2=-=-1--1
+2-20-=212=01
+1=1--00--0=12=-00
+22--
+22
+22===1=-0-22-
+111-=
+2-111=0021=2
+200=22-=12-2=
+1==-=1=0
+1--=02-0002=
+1=-=2-2=2-
+2=2222220=2==001
+1=00==11=-20-=2-2
+1---0=-=
+1-0==10-=22001
+1=02=02-1=0111
+1-=010-21-=21==02
+10200-2=-=20120-2
+1=-
+10=122-
+210-1=-=2011-0--1
+2==-1=20
+1=-=101-20=221-1
+210
+1-=-==-0-=02=---
+1-=1=-=12=0
+1-=0---12-0=
+210-==1021=010=1
+1=-212
+11=1=-=2211=101222-
+2=-==--=2
+1=11-200--=
+1120-
+11=-0=221=0101=
+11-1=-
+1-12-2=0
+1012-22=1-
+20-122=-1=
+1-100=0=101-0
+20-1=1=0
+1102=
+21
+10=20=11
+1-=2001
+1-20=12-0221102-==
+1-1--010100=-1=
+221002==2102-2=1
+2012=121-22
+110222002=01
+212102-1=1=-211
+210-=12
+1=-1-0101=1-12
+12--21=1
+10=-12
+100-122211=--2=
+101102001
+11011=-
+211-0=-=0
+1-2=01-1=
+1-022-=00000
+2==-0==2=--00=
+10=--2000==
+1---=--1-110-02
+11-012
+2==-2210-0
+212
+22-=-12111
+2--=
+2=2=12-100
+10-12===0-
+1==0=0=22012201
+211-1--22