Submission #917591

#	Time	Username	Problem	Language	Result	Execution time	Memory
917591		PotatoMan	Zagrade (COI20_zagrade)	C++14	71 / 100	502 ms	1708 KiB

zagrade

#include <bits/stdc++.h>
#define inf INT_MAX
#define longlonginf LONG_LONG_MAX
#define mod 998244353
#define MAXN 200005
#define pii pair<ll,ll>
#define ll long long
#define deb(x) cerr<<"[ "<<#x<<" = "<<x<<" ]";
#define yes() cout<<"YES\n";
#define no() cout<<"NO\n";
using namespace std;
 
ll n,k,m,q,cur,z;
ll ans = 0;
string subtask;

void solve(){
	cin>>n>>q;
	ll rem = n/2;
	stack<int> s;
	string res = string(n,'.');
	for(int i = 1 ; i <= n ; i++){
		if( s.empty() ) {
			s.push(i);
			continue;
		}
		cout<<"? "<<s.top()<<" "<<i<<endl;
		cin>>k;
		if(k){
			res[s.top()-1] = '(';
			res[i-1] = ')';
			s.pop();
			rem--;
		}
		else{
			s.push(i);
		}
	}
	for(int i = 0 ; i < rem/2 ; i++) {
		res[s.top()] =  ')';
		s.pop();
	}
	for(int i = 0 ; i < rem/2 ; i++) {
		res[s.top()] =  '(';
		s.pop();
	}
	cout<<"! "<<res<<endl;
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int T = 1;
	//cin>>T;
	for(int i = 0 ; i < T ; i++){
		//cout<<"Case #"<<i+1<<": ";
		solve();
	}
	return 0;
}
 
/*
	out of bound for loop
	(constraint change in loop)
	forget to change bool to int
	misread -> missed subtask
	you thought u declared it huh?
	not i but x
	logical operator
	wrong example/proof
	thoroughly
	wrong variables
	thinking it wrong
	bruh just try some test case
	capitals ;-;
	wrong data structure lol
	count memory usement
	corner case
	oversized array
	orders
	statements
	size initializer
	while con
	map -> array
	wrong digits??
	swapped variables??
	check if theres any variabled
	that got declared twice
	find some pattern
	name collision
	constraints??!
	mod !!
	resets
*/

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