func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     vector<long long int> vec1, vec2;     vector<long long int>::iterator it;     long long int n, a, sz, s1 = 0, s2 = 0, s3 = 0;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> a;       s1 += a;     }     n--;     for (int i = 0; i < n; i++) {       cin >> a;       s2 += a;     }     n--;     for (int i = 0; i < n; i++) {       cin >> a;       s3 += a;     }     cout << s1 - s2 << endl << s2 - s3;     return 0;   }   