제출 #1052060

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1052060		vako_p	Colors (BOI20_colors)	C++14	100 / 100	1 ms	596 KiB

Colors

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back

const int mxN = 1e5 + 5;
ll n,dis[mxN];

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	ll ans;
	cin >> n;
	ll l = 0, r = n,idx = 0;
	while(r > l + 1){
		ll mid = l + (r - l) / 2;
		dis[idx++] = mid;
		l = mid;
	}
	ll dis1 = 0;
	for(int i = 1; i < idx; i += 2) dis1 += dis[i] - dis[i - 1];
	ll curr = dis1 + 1,xx = 0;
	cout << "? " << curr << endl;
	cin >> ans;
	l = 0, r = n;
	while(r > l + 1){
		ll mid = l + (r - l) / 2;
		curr += mid * ((xx % 2 > 0) ? (-1) : (1));
		cout << "? " << curr << endl;
		cin >> ans;
		if(!ans) l = mid;
		else r = mid;	
		xx++;
	}
	cout << "= " << r << endl;
}

• Subtask 1: 9 / 9
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 24 / 24
• Subtask 5: 33 / 33