func_code_string: #include <bits/stdc++.h>   using namespace std;   long long const mod = 1e9 + 7;   long long const long_max = LONG_LONG_MAX;   int interact(int i, int j) {     cout <<  ?   << i + 1 <<     << j + 1 <<   n ;     ;     cout.flush();     int x;     cin >> x;     return x;   }   void solve() {     int n;     cin >> n;     int ind = 0;     vector<int> b(n);     for (int i = 1; i < n; i++) {       int x = interact(ind, i);       int y = interact(i, ind);       if (x < y) {         b[i] = y;       } else {         b[ind] = x;         ind = i;       }     }     b[ind] = n;     cout <<  !  ;     for (auto i : b) cout << i <<    ;     cout <<   n ;   }   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     int t = 1, p;     p = t;     t = 1;     while (p--) {       solve();       t++;     }     return 0;   }   