题目:https://leetcode-cn.com/problems/scramble-string/ 参考:https://leetcode-cn.com/problems/scramble-string/solution/c-dong-tai-gui-hua-by-da-li-wang-36/
class Solution {
public:
bool isScramble(string s1, string s2) {
/*
*给出两个长度相等的字符串 s1 和 s2,
*判断 s2 是否是 s1 的扰乱字符串
*区间dp
*定义dp[len][i][j]表示s1.substr(i,len)
*和s2.substr(j,len)是否能通过扰乱匹配
*最后答案即为dp[len][1][1]
*/
int n = s1.length();
vector dp;
dp.resize(n+1);
for(int i = 0;i
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