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Submission #641591

# Submission time Handle Problem Language Result Execution time Memory
641591 2022-09-17T06:04:24 Z bonk Zagrade (COI20_zagrade) C++14
100 / 100
 1002 ms 960 KB 
#include <bits/stdc++.h>

using namespace std;

int ask(int a, int b){
    cout << "? " << a << " " << b << endl;
    int ret; cin >> ret;

    return ret;
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n, q; cin >> n >> q;
    vector<char>ans(n + 1, '#');
    stack<int>st;

    int cnt = 0;

    for(int i = 1; i <= n; i++){
        if(st.empty()){
            st.push(i);
            continue;
        }

        int x = st.top(); 
        if(ask(x, i)){
            cnt += 2;
            ans[x] = '(';
            ans[i] = ')';
            st.pop();
        } else{
            st.push(i);
        }
    }

    int unused = n - cnt;
    int tmp = unused;

    cout << "! ";

    for(int i = 1; i <= n; i++){
        if(ans[i] == '#'){
            if(tmp > unused/2) ans[i] = ')';
            else ans[i] = '(';
            tmp--;
        } 

        cout << ans[i];
    }

    cout << 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 4 ms 208 KB Output is correct
3 Correct 7 ms 208 KB Output is correct
4 Correct 7 ms 208 KB Output is correct
5 Correct 10 ms 208 KB Output is correct
6 Correct 8 ms 208 KB Output is correct
7 Correct 9 ms 208 KB Output is correct
8 Correct 7 ms 208 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 8 ms 320 KB Output is correct
3 Correct 8 ms 312 KB Output is correct
4 Correct 8 ms 312 KB Output is correct
5 Correct 6 ms 208 KB Output is correct
6 Correct 7 ms 208 KB Output is correct
7 Correct 6 ms 208 KB Output is correct
8 Correct 7 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 369 ms 392 KB Output is correct
3 Correct 714 ms 396 KB Output is correct
4 Correct 774 ms 404 KB Output is correct
5 Correct 890 ms 396 KB Output is correct
6 Correct 905 ms 396 KB Output is correct
7 Correct 1002 ms 604 KB Output is correct
8 Correct 639 ms 400 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Output is correct
2 Correct 833 ms 744 KB Output is correct
3 Correct 783 ms 568 KB Output is correct
4 Correct 823 ms 836 KB Output is correct
5 Correct 860 ms 548 KB Output is correct
6 Correct 822 ms 960 KB Output is correct
7 Correct 788 ms 748 KB Output is correct
8 Correct 837 ms 400 KB Output is correct