func_code_string: #include <bits/stdc++.h>   using namespace std;   string s[101][2];   int n, m;   int main() {     cin >> n;     m = 0;     for (int i = 1; i <= n; i++) {       bool mark = true;       m++;       cin >> s[m][0] >> s[m][1];       for (int j = 1; j < m; j++)         if ((s[m][0] == s[j][0]) && (s[m][1] == s[j][1])) {           mark = false;           break;         }       if (!mark) {         m--;       }     }     cout << m << endl;     return 0;   }   