s[cntt].erase(s[cntt].find(s[i]),s[cntt].find(s[i])+s[i].size()-1);

s是字符串数组，我想在s[cntt]里找s[i]然后删除，但是运行时会出现这个然后卡死：

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::erase: __pos (which is 18446744073709551615) > this->size() (which is 0)

我就想是不是find的问题，求大佬解答有没有好方法QWQ