Submission #299558

#	Time	Username	Problem	Language	Result	Execution time	Memory
299558		E869120	Colors (BOI20_colors)	C++14	9 / 100	2 ms	416 KiB

Colors

#include <iostream>
using namespace std;

long long N;

int main() {
	// Step #1. Input
	cin >> N;
	
	// Step #2. Get Answer
	int ret = N;
	int cl = 1, cr = N;
	for (int i = 1; i <= N; i++) {
		if (i % 2 == 1) { cout << "? " << cl << endl; cl += 1; }
		if (i % 2 == 0) { cout << "? " << cr << endl; cr -= 1; }
		int x; cin >> x;
		if (i >= 2 && x == 1) { ret = N - i + 1; }
	}
	cout << "= " << ret << endl;
	return 0;
}

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