[Leetcode]@python 87. Scramble String.py
题目链接
https://leetcode.com/problems/scramble-string/
题目原文
We say that "rgtae" is a scrambled string of "great".
Given two strings s1 and s2 of the same length, determine if s2 is a scrambled string of s1.
题目大意
给定字符串s1和s2,判断s2是否s1的拼凑串
解题思路
使用递归的方法来解决
代码
class Solution(object):
def isScramble(self, s1, s2):
"""
:type s1: str
:type s2: str
:rtype: bool
"""
if len(s1) != len(s2):
return False
if s1 == s2:
return True
l1 = list(s1)
l2 = list(s2)
l1.sort()
l2.sort()
if l1 != l2: return False
length = len(s1)
for i in range(1, length):
if self.isScramble(s1[:i], s2[:i]) and self.isScramble(s1[i:], s2[i:]):
return True
if self.isScramble(s1[:i], s2[length - i:]) and self.isScramble(s1[i:], s2[:length - i]):
return True
return False