func_code_string: #include <bits/stdc++.h>   using namespace std;   int mp[100][100];   int cnt[100];   int main() {     int n, x, y;     cin >> n;     while (cin >> x) {       cin >> y;       mp[x][y] = 1;       mp[y][x] = 1;       cnt[x]++;     }     for (int i = 1; i <= n; i++) {       for (int j = i + 1; j <= n; j++) {         if (!mp[i][j]) {           if (cnt[i] > cnt[j])             cout << i <<     << j;           else             cout << j <<     << i;           return 0;         }       }     }   }   