제출 #1217564

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1217564		VMaksimoski008	Zagrade (COI20_zagrade)	C++17	71 / 100	227 ms	720 KiB

zagrade

#include <bits/stdc++.h>
#define ar array
//#define int long long

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const ll inf = 1e18;
const int N = 1e5 + 5;

int ask(int i, int j) {
    cout << "? " << i << " " << j << endl;
    int x; cin >> x;
    return x;
} 

signed main() {
    int n, q; cin >> n >> q;
    string ans(n+1, '.');
    ans[1] = '(';

    stack<int> st; st.push(1);
    for(int i=2; i<=n; i++) {
        if(st.empty()) {
            st.push(i);
            ans[i] = '(';
            continue;
        }
        int x = ask(st.top(), i);
        if(x == 1) {
            ans[i] = ')';
            st.pop();
        } else {
            ans[i] = '(';
            st.push(i);
        }
    }

    cout << "! ";
    for(int i=1; i<=n; i++) cout << ans[i];
    cout << endl;
}

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