Submission #651087

#	Time	Username	Problem	Language	Result	Execution time	Memory
651087		_HDH	Zagrade (COI20_zagrade)	C++11	71 / 100	958 ms	924 KiB

zagrade

#include <bits/stdc++.h>

#ifdef LOCAL
#include <debug.h>
#else
#define debug(...) 1001
#endif

using namespace std;
#define all(x) x.begin(), x.end()
#define st first
#define nd second
#define lb lower_bound
#define ub upper_bound
#define sz(x) (int)x.size()
#define pb push_back
#define pob pop_back
#define pf push_front
#define pof pop_front
#define file "TEMPLATE"

typedef long long ll;
typedef pair<int, int> ii;
typedef array<int, 3> iii;
typedef vector<int> vi;
typedef vector<ll> vl;

bool const SINGLE_TEST = 1;

bool ask(int l, int r){
	cout << "? " << l << " " << r << "\n";
	cout.flush();
	bool ans; cin >> ans;
	return ans;
}

void answer(string s){
	cout << "!" << s << "\n";
	cout.flush();
}

void solve(){
	int n, q; cin >> n >> q;
	
	string s = " (";
	deque<int> que;
	que.pb(1);
	for (int i = 2; i <= n; i++){
		if (que.empty()) que.pb(i), s.pb('(');
		else{
			if (ask(que.back(), i)){
				que.pob(), s.pb(')');
			}else que.pb(i), s.pb('(');
		}
	}
	answer(s);
}

int main(){
	ios_base::sync_with_stdio(0);//      the
	cin.tie(0);cout.tie(0);// 	    magical lines	
	// freopen(file".inp", "r", stdin);
	// freopen(file".out", "w", stdout);
	int t;
	if (SINGLE_TEST) t = 1;
	else cin >> t;
	while (t--) solve();
	return 0;
}//it's coding time!

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