#include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     map<int, int> a;     for (int i = 0; i < n; i++) {       int temp;       cin >> temp;       a[temp]++;     }     map<int, int> b;     for (int i = 0; i < n - 1; i++) {       int temp;       cin >> temp;       b[temp]++;     }     map<int, int> c;     for (int i = 0; i < n - 2; i++) {       int temp;       cin >> temp;       c[temp]++;     }     for (map<int, int>::iterator it = a.begin(); it != a.end(); ++it) {       if (it->second != b[it->first]) {         cout << it->first << endl;         break;       }     }     for (map<int, int>::iterator it = b.begin(); it != b.end(); ++it) {       if (it->second != c[it->first]) {         cout << it->first << endl;         break;       }     }     return 0;   }   