C++ | Leetcode C++题解之第10题正则表达式匹配

题目：

题解：

class Solution {
public:bool isMatch(string s, string p) {int m = s.size();int n = p.size();auto matches = [&](int i, int j) {if (i == 0) {return false;}if (p[j - 1] == '.') {return true;}return s[i - 1] == p[j - 1];};vector<vector<int>> f(m + 1, vector<int>(n + 1));f[0][0] = true;for (int i = 0; i <= m; ++i) {for (int j = 1; j <= n; ++j) {if (p[j - 1] == '*') {f[i][j] |= f[i][j - 2];if (matches(i, j - 1)) {f[i][j] |= f[i - 1][j];}}else {if (matches(i, j)) {f[i][j] |= f[i - 1][j - 1];}}}}return f[m][n];}
};