Submission #858763

#	Time	Username	Problem	Language	Result	Execution time	Memory
858763		maks007	Colors (BOI20_colors)	C++14	0 / 100	1 ms	604 KiB

Colors

#include "bits/stdc++.h"
 
using namespace std;
 
#define int long long
 
signed main () {
	int n;
	cin >> n;
	int l = 1, r = n+2, f = 1;
	cout << "? " << 1 << endl;
	int x;
	cin >> x;
	if(n > 64) {
		return 0;
	}
	while(1) {
		if(l+2>=r)break;
		if(f == 1) {
			r -= 2;
			cout << "? " << r << endl;
			cin >> x;
			if(x == 0) {
				cout << "? " << l-1 << endl;
				int x;
				cin >> x;
				if(x == 1) {
					cout << "= " << r-(l-1) << endl;
				}else {
					cout << "= " << r-(l-2) << endl; 
				}
				return 0;
			}
			f = -1;
		}else {
			l += 2;
			cout << "? " << l << endl;
			cin >> x;
			if(x == 0) {
				cout << "? " << r+1 << endl;
				int x;
				cin >> x;
				if(x == 1) {
					cout << "= " << r+1-l << endl;
				}else {
					cout << "= " << r+2-l << endl;
				}
				return 0;
			}
			f=1;
		}
	}
	cout << "= 1" << endl;
	return 0;
}

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