oj.uz

Submission #781294

# Submission time Handle Problem Language Result Execution time Memory
781294 2023-07-13T02:07:27 Z makanhulia Zagrade (COI20_zagrade) C++17
71 / 100
 645 ms 680 KB 
#include<bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long, long long>

int n,q,sisa;
stack<int> st;
char s[100069];

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int i,j;
    cin>>n>>q;
    sisa = n/2;
    for(i=1;i<=n;i++)
    {
        if(st.empty())
        {
            st.push(i);
            continue;
        }
        cout<<"? "<<st.top()<<" "<<i<<'\n';
        cout.flush();
        bool valid;
        cin>>valid;
        if(valid)
        {
            s[st.top()] = '(';
            s[i] = ')';
            sisa--;
            st.pop();
        }
        else
        {
            st.push(i);
        }
    }
    while(!st.empty())
    {
        int x = st.top();
        st.pop();
        if(sisa)
        {
            s[x] = ')';
            sisa--;
        }
        else
        {
            s[x] = '(';
        }
    }
    cout<<"! ";
    for(i=1;i<=n;i++)
    {
        cout<<s[i];
        if(i == n)
        {
            cout<<'\n';
        }
    }
}

Compilation message

zagrade.cpp: In function 'int main()':
zagrade.cpp:17:11: warning: unused variable 'j' [-Wunused-variable]
   17 |     int i,j;
      |           ^

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 6 ms 208 KB Output is correct
5 Correct 6 ms 208 KB Output is correct
6 Correct 4 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
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 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 1 ms 208 KB Output is correct
2 Correct 277 ms 376 KB Output is correct
3 Correct 615 ms 392 KB Output is correct
4 Correct 619 ms 432 KB Output is correct
5 Correct 645 ms 492 KB Output is correct
6 Correct 547 ms 584 KB Output is correct
7 Correct 579 ms 680 KB Output is correct
8 Correct 508 ms 516 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 -