Created
December 4, 2019 05:12
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Advent of Code 2019 day 4 solution
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| # input | |
| lo = 372037 | |
| hi = 905157 | |
| ans = 0 | |
| def test(s): | |
| c = 0 | |
| d = 0 | |
| for i in range(5): | |
| if s[i] > s[i+1]: | |
| return False | |
| elif s[i] == s[i+1]: | |
| d += 1 | |
| else: | |
| if d == 1: # change to `d > 0` for part 1 | |
| c += 1 | |
| d = 0 | |
| if d == 1: # change to `d > 0` for part 1 | |
| c += 1 | |
| return c > 0 | |
| for i in range(lo, hi+1): | |
| s = str(i) | |
| if test(s): | |
| ans += 1 | |
| print(ans) |
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