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Submission #781283

# Submission time Handle Problem Language Result Execution time Memory
781283 2023-07-13T02:01:31 Z devariaota Zagrade (COI20_zagrade) C++17
100 / 100
 776 ms 1328 KB 
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define pii pair<int, int>
#define fr first
#define sc second
#define query(l, r)                                                              cout << "? " << l << " " << r << endl;                                         cin >> res;
using namespace std;

const int N = 1e5 + 5;

string ans;
bool res;

signed main() {
    ios_base::sync_with_stdio(false);
    cout.tie(NULL);
    cin.tie(NULL);
    int n, q;
    cin >> n >> q;
    ans.assign(n, ' ');
    stack<int> s;
    s.push(1);
    int cnt = 0;
    for (int i = 2; i <= n; i++) {
        if (s.empty()) {
        s.push(i);
        continue;
        }
        int cur = s.top();
        query(cur, i);
        if (res) {
        ans[cur - 1] = '(';
        ans[i - 1] = ')';
        cnt++;
        s.pop();
        } else
        s.push(i);
    }
    int cntfrr = n / 2 - cnt;
    for (int i = 0; i < n; i++) {
        if (ans[i] == ' ') {
        if (cntfrr) {
            ans[i] = ')';
            cntfrr--;
        } else
            ans[i] = '(';
        }
    }
    cout << "! " << ans << endl;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 4 ms 208 KB Output is correct
3 Correct 6 ms 208 KB Output is correct
4 Correct 5 ms 208 KB Output is correct
5 Correct 7 ms 208 KB Output is correct
6 Correct 10 ms 208 KB Output is correct
7 Correct 9 ms 208 KB Output is correct
8 Correct 6 ms 208 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 4 ms 312 KB Output is correct
3 Correct 4 ms 208 KB Output is correct
4 Correct 8 ms 256 KB Output is correct
5 Correct 9 ms 208 KB Output is correct
6 Correct 9 ms 208 KB Output is correct
7 Correct 6 ms 208 KB Output is correct
8 Correct 8 ms 208 KB Output is correct

Subtask #3
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 381 ms 396 KB Output is correct
3 Correct 522 ms 392 KB Output is correct
4 Correct 455 ms 400 KB Output is correct
5 Correct 679 ms 396 KB Output is correct
6 Correct 516 ms 396 KB Output is correct
7 Correct 566 ms 804 KB Output is correct
8 Correct 665 ms 392 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 529 ms 1328 KB Output is correct
3 Correct 684 ms 784 KB Output is correct
4 Correct 622 ms 864 KB Output is correct
5 Correct 550 ms 540 KB Output is correct
6 Correct 551 ms 876 KB Output is correct
7 Correct 610 ms 664 KB Output is correct
8 Correct 776 ms 396 KB Output is correct