Submission #1152629

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152629		zhehan	Zagrade (COI20_zagrade)	C++20	71 / 100	228 ms	776 KiB

zagrade

#include <bits/stdc++.h>
using namespace std;

typedef pair<int,int> ii;

int main(){
    int n, q, check;
    string ans;
    vector<ii> paired;
    cin>>n>>q;
    int ptr=1;
    int counter=0;
    stack<int> singlepos;
    while(ptr<n+1){
        if(ptr==n){
            ptr++;
            continue;
        }
        cout<<"? "<<ptr<<' '<<ptr+1<<endl;
        cin>>check;
        if(check==0){
            ans+='(';
            singlepos.push(ptr);
            ++ptr;
        }else{
            ans+="()";
            ptr+=2;
            while(check==1){
                if(singlepos.empty()) break;
                cout<<"? "<<singlepos.top()<<' '<<ptr<<endl;
                cin>>check;
                if(check==1){
                    ans+=')';
                    singlepos.pop();
                    ptr++;
                }
            }
        }
    }
    while(ans.length()<n){
        ans+=')';
    }
    cout<<"! "<<ans;
    return 0;
}   

• Subtask 1: 14 / 14
• Subtask 2: 0 / 7
• Subtask 3: 57 / 57
• Subtask 4: 0 / 22