Leetcode 1208. 尽可能使字符串相等 题解

题目链接：https://leetcode-cn.com/problems/get-equal-substrings-within-budget/

滑动窗口自左向右遍历，每次sum加上右指针对应的开销，一旦sum > maxCost，就将左指针右移直到满足条件。每次都更新最大值。

代码如下：

class Solution {
public:int equalSubstring(string s, string t, int maxCost) {int l = 0, r = 0, sum = 0, res = 0;while(r < s.size()) {sum += abs(s[r] - t[r]);r++;while(sum > maxCost) {sum -= abs(s[l] - t[l]);l++;}res = max(res, r - l);}return res;}
};