b.py (342B)
1 import fileinput 2 from functools import cache 3 4 neginf = -1e13 5 6 @cache 7 def joltage(line, n): 8 if n == 0: 9 return 0 10 if n > len(line)-1: 11 return neginf 12 j = 0 13 for i in range(len(line)-1): 14 j = max(j, int(line[i])*10**(n-1)+joltage(line[i+1:],n-1)) 15 return j 16 17 with fileinput.input() as lines: 18 print(sum(joltage(line, 12) for line in lines))