leetcode

0 class Solution {

1 public:

2 int appendCharacters(const string &s, const string &t) {

3 int j = 0;

4 for (int i = 0; i < s.size() && j < t.size(); i++)

5 if (s[i] == t[j]) j++;

6 return t.size() - j;

7 }

8 };