Submission #829013

#	Time	Username	Problem	Language	Result	Execution time	Memory
829013		vjudge1	Colors (BOI20_colors)	C++17	0 / 100	1 ms	208 KiB

Colors

#include <bits/stdc++.h>
using namespace std;
#define fastio ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define fi first
#define se second

ll n, l, r, mid, x, c, memo;
bool b;

int main() {
	fastio;
	cin >> n;
	l = 1;
	r = n;
	c = 1e9;
	for (int i = 1; i <= 32; i++) {
		mid = (l+r)/2;
		cout << "? " << 1 << endl;
		cin >> b;
		cout << "? " << mid << endl;
		cin >> b;
		if (!b) {
			l = mid + 1;
		} else {
			r = mid - 1;
			c = min(c, mid);
		}
	}
	cout << "= " << c << endl;
}

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