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dynamic_programming/abbreviation.py
39 строк
935 B
Sanders Lin
Update abbreviation.py (#1887)
17 апр 2020, 21:04
Не верифицирован
17 апр 2020, 21:04
1c9d4a3
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""" https://www.hackerrank.com/challenges/abbr/problem You can perform the following operation on some string, : 1. Capitalize zero or more of 's lowercase letters at some index i (i.e., make them uppercase). 2. Delete all of the remaining lowercase letters in . Example: a=daBcd and b="ABC" daBcd -> capitalize a and c(dABCd) -> remove d (ABC) """ def abbr(a: str, b: str) -> bool: """ >>> abbr("daBcd", "ABC") True >>> abbr("dBcd", "ABC") False """ n = len(a) m = len(b) dp = [[False for _ in range(m + 1)] for _ in range(n + 1)] dp[0][0] = True for i in range(n): for j in range(m + 1): if dp[i][j]: if j < m and a[i].upper() == b[j]: dp[i + 1][j + 1] = True if a[i].islower(): dp[i + 1][j] = True return dp[n][m] if __name__ == "__main__": import doctest doctest.testmod()