func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string a;     string b;     cin >> a >> b;     long long int len1 = a.length();     long long int len2 = b.length();     if (a.compare(b) == 0) {       cout <<  -1 n ;     } else {       if (len1 > len2)         cout << len1 <<   n ;       else         cout << len2 <<   n ;     }   }   