제출 #858745

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
858745		maks007	Colors (BOI20_colors)	C++14	9 / 100	1 ms	600 KiB

Colors

#include "bits/stdc++.h"
 
using namespace std;
 
#define int long long
 
signed main () {
	int n;
	cin >> n;
	int l = 1, r = n+1, f = 1;
	cout << "? " << 1 << endl;
	int x;
	cin >> x;
	if(n > 64) {
		return 0;
	}
	while(1) {
		if(l+1>=r)break;
		if(f == 1) {
			r --;
			cout << "? " << r << endl;
			cin >> x;
			if(x == 0) {
				assert(r-l<n);
				cout <<"= " << r-l+1 << endl;
				return 0;
			}
			f = -1;
		}else {
			l ++;
			cout << "? " << l << endl;
			cin >> x;
			if(x == 0) {
				assert(r-l<n);
				cout <<"= " << r-l+1 << endl;
				return 0;
			}
			f=1;
		}
	}
	cout << "= 1" << endl;
	return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33