Submission #781265

#	Time	Username	Problem	Language	Result	Execution time	Memory
781265		devariaota	Zagrade (COI20_zagrade)	C++17	0 / 100	628 ms	1608 KiB

zagrade

#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define keish                             ios_base::sync_with_stdio(0);       cin.tie(0); cout.tie(0)
      
using namespace std;

int n, q, ok;

signed main(){
      keish;
  cin >> n >> q;

      vector<char> c(n);
      vector<int> v;
      v.push_back(1);

      int cnt = n / 2;
      for(int i = 2; i <= n; i++){
            cout << "? " << v.back() << " " << i << endl;
            cin >> ok;
            if(ok){
                  c[v.back() - 1] = '(';
                  c[i - 1] = ')';
                  cnt--;
                  v.pop_back();
            }else{
                  v.push_back(i);
            }
      }

      for(auto x : v){
            if(cnt) c[x - 1] = ')', cnt--;
            else c[x - 1] = '(';
      }
      
      cout << "! "; for(auto x : c) cout << x; cout << endl;
}     

• Subtask 1: 0 / 14
• Subtask 2: 0 / 7
• Subtask 3: 0 / 57
• Subtask 4: 0 / 22