Submission #641572

#	Time	Username	Problem	Language	Result	Execution time	Memory
641572		kebine	Zagrade (COI20_zagrade)	C++17	0 / 100	804 ms	2848 KiB

zagrade

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
int main() 
{
    cin.tie(0); ios_base::sync_with_stdio(0);

    int n, q;
    cin >> n >> q;

    vector<int> ans(n, -1), v;
    set<int> s;
    s.insert(0);
    for(int i = 1; i < n; i++) {
        int l = *s.rbegin(), r = i;
        while(1) {
            if(l >= 0 && r < n) {
                cout << "? " << l + 1 << " " << r + 1 << endl;
                int x; cin >> x;
                if(x) {
                    ans[l] = 1;
                    ans[r] = 0;
                    l--, r++;
                } else {
                    break;
                }
            } else {
                break;
            }
        }
        if(ans[i] == -1) s.insert(i);
        i = r;
    }

    cout << "! ";
    for(int i = 0; i < n; i++) {
        if(ans[i]) cout << '('; 
        else cout << ')';
    }
}

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