count_prefix_suffix_pair1.py (1160B)
| # 3042. Count Prefix and Suffix Pairs I
"""
you are given a 0-indexed string array 'words'. let's define a boolean
function 'isPrefixSuffix' that takes two strings 'str1' and 'str2'.
'isPrefixSuffix()' returns true if 'str1' is both a prefix and suffix of
'str2', and false otherwise. return an integer denoting the number of index
pairs '(i, j)' such that 'i < j' and 'isPrefixSuffix(words[i], words[j])' is
true.
"""
class Solution(object):
def countPrefixSuffixPairs(self, words):
"""
:type words: List[str]
:rtype: int
"""
cnt = 0
for i in range(len(words)):
for j in range(i + 1, len(words)):
if (
words[j].find(words[i], 0, len(words[i])) == 0
and words[j][::-1].find(words[i][::-1], 0, len(words[i])) == 0
):
cnt += 1
return cnt
if __name__ == "__main__":
obj = Solution()
print(obj.countPrefixSuffixPairs(words=["a", "aba", "ababa", "aa"]))
print(obj.countPrefixSuffixPairs(words=["pa", "papa", "ma", "mama"]))
print(obj.countPrefixSuffixPairs(words=["abab", "ab"]))
|
