func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int ans[n];     int a, b, c;     cout <<  ? 1 2  << endl;     cin >> a;     cout <<  ? 1 3  << endl;     cin >> b;     cout <<  ? 2 3  << endl;     cin >> c;     ans[0] = ((a + b + c) / 2) - c;     ans[1] = ((a + b + c) / 2) - b;     ans[2] = ((a + b + c) / 2) - a;     for (int i = 4; i < n + 1; i++) {       cout <<  ? 1   << i << endl;       int x;       cin >> x;       ans[i - 1] = x - ans[0];     }     cout <<  !  ;     for (int i = 0; i < n; i++) cout << ans[i] <<    ;     return 0;   }   