Submission #920422

#	Time	Username	Problem	Language	Result	Execution time	Memory
920422		zeta7532	Zagrade (COI20_zagrade)	C++17	14 / 100	709 ms	540 KiB

zagrade

#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
using ll = long long;
const ll mod = 998244353;
#define fi first
#define se second
#define rep(i,n) for(ll i=0;i<n;i++)
#define all(x) x.begin(),x.end()
#define faster ios::sync_with_stdio(false);cin.tie(nullptr)

int main() {
    ll N,Q;
    cin >> N >> Q;
    vector<char> ans(N,'-');
    ll last=N;
    rep(i,N){
        if(ans[i]!='-') continue;
        for(ll j=i+1;j<N;j+=2){
            if(ans[j]!='-') continue;
            cout << "?" << " " << i+1 << " " << j+1 << endl;
            ll q;
            cin >> q;
            if(q==1){
                ans[i]='(';
                ans[j]=')';
                last=j;
                break;
            }
        }
        if(ans[i]=='-'){
            ans[i]=')';
            ans[last-1]='(';
            last=last-1;
        }
    }
    cout << "!" << " ";
    rep(i,N) cout << ans[i];
    cout << endl;
    return 0;
}

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