func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string a, b;     cin >> a >> b;     long long n, m, i, j, k = 200000;     n = a.size();     m = b.size();     for (i = 1; i <= k; i++) {       if (n - i >= 0 && m - i >= 0) {         if (a[n - i] != b[m - i]) break;       } else         break;     }     cout << (n - i) + 1 + (m - i) + 1;   }   