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Submission #780941

# Submission time Handle Problem Language Result Execution time Memory
780941 2023-07-12T14:51:09 Z christinelynn Zagrade (COI20_zagrade) C++17
71 / 100
 716 ms 676 KB 
#include<bits/stdc++.h>
 
#define sherina ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define pb push_back
#define int long long
#define INF 1e18

using namespace std;

int n , q;
stack < int > st;
char ans[200005];

signed main(){
    cin >> n >> q;
    st.push(1);
    for(int i = 0 ; i <= n ; i++) ans[i] = ' ';
    for(int i = 2 ; i <= n ; i++){
        if(st.empty()){
            st.push(i);
            continue;
        }
        cout << "? " << st.top() << " " << i << endl;
        int anss; cin >> anss;
        if(anss){
            ans[st.top()] = '(';
            ans[i] = ')';
            st.pop();
        }
        else st.push(i);
    }
    if(st.size() >= 1){ 
        for(int i = 1 ; i <= n / 2 ; i++){
            if(ans[i] != ')' && ans[i] != '(') ans[i] = ')';
        }
        for(int i = n/2 ; i >= 1 ; i--){
            if(ans[i] != ')' && ans[i] != '(') ans[i] = '(';
        }
    }
        cout << "! ";
        for(int i = 1 ; i <= n ; i++) cout << ans[i];
        cout << endl;
}

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 8 ms 208 KB Output is correct
4 Correct 8 ms 208 KB Output is correct
5 Correct 9 ms 208 KB Output is correct
6 Correct 6 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 #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB Answer length should be 2, but it is 1
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 363 ms 336 KB Output is correct
3 Correct 544 ms 336 KB Output is correct
4 Correct 599 ms 336 KB Output is correct
5 Correct 716 ms 336 KB Output is correct
6 Correct 653 ms 348 KB Output is correct
7 Correct 416 ms 676 KB Output is correct
8 Correct 616 ms 380 KB Output is correct

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 208 KB Answer length should be 4, but it is 2
2 Halted 0 ms 0 KB -