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Submission #706252

# Submission time Handle Problem Language Result Execution time Memory
706252 2023-03-06T07:57:11 Z vjudge1 Zagrade (COI20_zagrade) C++17
71 / 100
 830 ms 844 KB 
#include <bits/stdc++.h>
// #define endl '\n'
#define FAST ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define int ll
typedef long long ll;
using namespace std;
const int N = 200000 + 10;
bool vis[N];
signed main() {
    // FAST;
    int n, q;
    cin >> n >> q;
    stack<int> st;
    st.push(0);
    vis[0] = 1;
    for(int i = 1; i < n - 1; i++) {
        if(!st.size()) {
            st.push(i);
            vis[i] = 1;
        }
        else {
            cout << "? " << st.top() + 1 << ' ' << i + 1 << endl;
            int x;
            cin >> x;
            if(x == 1) st.pop();
            else {
                st.push(i);
                vis[i] = 1;
            }
        }
    }
    string s = "";
    for(int i = 0; i < n; i++) {
        if(vis[i]) s += "(";
        else s += ")";
    }
    cout << "! " << s << endl;
    return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 5 ms 208 KB Output is correct
3 Correct 10 ms 304 KB Output is correct
4 Correct 8 ms 308 KB Output is correct
5 Correct 9 ms 284 KB Output is correct
6 Correct 10 ms 292 KB Output is correct
7 Correct 8 ms 208 KB Output is correct
8 Correct 8 ms 308 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 208 KB Mismatch at position 1. Expected ), found (
2 Halted 0 ms 0 KB -

Subtask #3
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 255 ms 620 KB Output is correct
3 Correct 774 ms 844 KB Output is correct
4 Correct 820 ms 780 KB Output is correct
5 Correct 681 ms 836 KB Output is correct
6 Correct 830 ms 624 KB Output is correct
7 Correct 756 ms 756 KB Output is correct
8 Correct 709 ms 740 KB Output is correct

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB Mismatch at position 1. Expected ), found (
2 Halted 0 ms 0 KB -