func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, k;     cin >> n;     long int a = 0, b = 0, c = 0;     for (int i = 0; i < n; i++) {       cin >> k;       a = a + k;     }     for (int i = 0; i < n - 1; i++) {       cin >> k;       b = b + k;     }     for (int i = 0; i < n - 2; i++) {       cin >> k;       c = c + k;     }     cout << a - b << endl << b - c;     return 0;   }   