leetcode 686. 重复叠加字符串匹配

想吐槽一句，我是多少年没有看字符串了呀，，，，，居然真就．．．．

class Solution {
public:
    int repeatedStringMatch(string A, string B) {
    
        int ans = 1;
        string tmp = A;
        int sizeA = A.size();
        int sizeB = B.size();
        while (tmp.find(B) == string::npos) {
            if (tmp.size() > sizeA * 2 + sizeB) {
                return -1;
            }
            tmp += A;
            ans++;
        }
        return ans;
    }
};