Submission #640221

#	Time	Username	Problem	Language	Result	Execution time	Memory
640221		devariaota	Zagrade (COI20_zagrade)	C++17	71 / 100	894 ms	712 KiB

zagrade

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
const ll mod=1e9+7;
const ll maxn=1e5+5;
const int INF=1e9+5;
#define ok ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define fi first
#define se second
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define endl '\n'
int n, q, bk, ttp, jwb;
stack<int> st;
char ans[maxn];
int main() {
    ok
    cin >> n >> q;
    for(int i=1; i<=n; i++) {
        if(st.empty()) {
            ans[i]='(';
            st.push(i);
            continue;
        }
        cout << "? " << st.top() << " " << i << endl;
        cout.flush();
        cin >> jwb;
        if(jwb==1) {
            ans[i]=')';
            st.pop();
        } else {
            ans[i]='(';
            st.push(i);
        }
    }
    cout << "! ";
    for(int i=1; i<=n; i++) {
        cout << ans[i];
    }
    cout << endl;
    return 0;
}

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