func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[505];   pair<int, int> query(set<int> s) {     cout <<  ?  ;     for (auto e : s) {       cout << e <<    ;     }     cout << endl;     pair<int, int> res;     cin >> res.first >> res.second;     a[res.first] = res.second;     return res;   }   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     int n, k;     cin >> n >> k;     set<int> s;     for (int i = 1; i <= k; i++) {       s.insert(i);     }     int mn = 1e9 + 1;     for (int i = k + 1; i <= n; i++) {       pair<int, int> u = query(s);       mn = min(mn, u.second);       s.erase(u.first);       s.insert(i);     }     pair<int, int> u = query(s);     mn = min(mn, u.second);     s.erase(u.first);     int ans = 1;     set<int> t;     int sm = 1e9 + 1, bg = 0;     for (int i = 1; i <= n; i++) {       if (a[i] != 0) {         t.insert(i);         sm = min(sm, a[i]);         bg = max(bg, a[i]);       }       if (t.size() == 2) break;     }     set<int> ss;     for (auto e : s) ss.insert(e);     for (auto e : t) ss.insert(e);     for (auto e : s) {       ss.erase(e);       auto u = query(ss);       if (u.second == bg) ans++;       ss.insert(e);     }     cout <<  !   << ans << endl;     return 0;   }   