Submission #773981

#	Time	Username	Problem	Language	Result	Execution time	Memory
773981		vjudge1	Zagrade (COI20_zagrade)	C++17	100 / 100	823 ms	1440 KiB

zagrade

#include <bits/stdc++.h>
using namespace std;
#define int long long
//#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
char dizi[100005];
vector <string> x;
vector <int> q;

int sor(int x,int y){
    cout<<"? "<<x<<" "<<y;
    cout<<endl;
    int m;cin>>m;
    return m;
}

int32_t main(){
   // faster
    q.clear();
    int n,k;
    cin>>n>>k;
    dizi[1]='(';
    q.push_back(1);
    for(int i=2;i<=n;i++){
        if(q.size() && sor(q.back(),i)){
            dizi[i]=')';
            q.pop_back();
        }
        else{
            dizi[i]='(';
            q.push_back(i);
        }
    }
    int gc=q.size()/2;
    for(int i=0;i<=gc-1;i++){
        dizi[q[i]]=')';
    }
    cout<<"! ";
    for(int i=1;i<=n;i++)cout<<dizi[i];
    cout<<endl;
    return 0;
}

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