Submission #1213327

#	Time	Username	Problem	Language	Result	Execution time	Memory
1213327		Ahmed_Kaaniche	Zagrade (COI20_zagrade)	C++20	71 / 100	230 ms	1296 KiB

zagrade

#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define pb push_back


signed main() {
    //the boost
//    ios_base::sync_with_stdio(false);
//    cin.tie(nullptr);
//    cout.tie(nullptr);
    
    //main code
    ll n, q;
    cin >> n >> q;
    vector<char> s(n+1, '.');
    s[1] = '(';
    s[n] = ')';
    vector<ll> prev(n+1, -1);
    ll curr=1;
    for (ll i = 2; i < n; ++i) {
        bool v;
        cout << "? " << curr << ' ' << i << endl;
        cout.flush();
        cin >> v;
        if(v){
            s[i]=')';
            if(prev[curr]==-1){
                s[i+1]='(';
                i++;
            }
            else{
                curr=prev[curr];
            }
        }
        else{
            s[i]='(';
            prev[i]=curr;
            curr=i;
        }
    }
    
    cout << "! ";
    for (ll i = 1; i <= n; ++i) {
        cout << s[i];
    }
    cout << endl;
    cout.flush();
    
    
    return 0;
}

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