Submission #554287

#	Time	Username	Problem	Language	Result	Execution time	Memory
554287		leaked	Zagrade (COI20_zagrade)	C++17	71 / 100	713 ms	716 KiB

zagrade

#include <bits/stdc++.h>

#define f first
#define s second
#define m_p make_pair
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define pw(x) (1LL<<(x))
#define sz(x) (int)(x).size()

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}

signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int n,q;
    cin>>n>>q;
    stack<int> st;
    st.push(0);
    auto ask=[&](int l,int r){
        cout<<"? "<<l+1<<' '<<r+1<<endl;
        cout.flush();
        int x;
        cin>>x;
        return x;
    };
    string ans(n,'(');
    for(int i=1;i<n;i++){
        if(sz(st) && ask(st.top(),i)){
            st.pop();ans[i]=')';
        }
        else st.push(i);
    }
    cout<<"! "<<ans;
    cout.flush();
    return 0;
}

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