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Submission #706247

# Submission time Handle Problem Language Result Execution time Memory
706247 2023-03-06T07:51:59 Z vjudge1 Zagrade (COI20_zagrade) C++17
0 / 100
 637 ms 736 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(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
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Incorrect 7 ms 320 KB Mismatch at position 3. Expected (, found )
3 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

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

Subtask #3
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Incorrect 637 ms 736 KB Mismatch at position 3. Expected (, found )
3 Halted 0 ms 0 KB -

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 -