func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MXN = 1e5 + 20;   int n, a[MXN], b[MXN], c[MXN];   vector<int> ans;   void IN() {     int tmp;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> tmp;       a[i] = tmp;     }     for (int i = 0; i < n - 1; i++) {       cin >> tmp;       b[i] = tmp;     }     for (int i = 0; i < n - 2; i++) {       cin >> tmp;       c[i] = tmp;     }   }   void SLV() {     sort(a, a + n);     sort(b, b + n - 1);     sort(c, c + n - 2);     for (int i = 0; i < n; i++)       if (b[i] != a[i]) {         ans.push_back(a[i]);         break;       }     for (int i = 0; i < n; i++)       if (c[i] != b[i]) {         ans.push_back(b[i]);         break;       }   }   void OUT() {     for (auto i : ans) cout << i << endl;   }   int main() {     IN();     SLV();     OUT();     return 0;   }   