Submission #514821

#	Time	Username	Problem	Language	Result	Execution time	Memory
514821		rajatshenoi	Colors (BOI20_colors)	C++14	0 / 100	0 ms	200 KiB

Colors

#include <bits/stdc++.h>

using namespace std;

int main(int argc, char const *argv[])
{
	int N;
	cin >> N;

	vector<int> pos(N);

	iota(pos.begin(), pos.end(), 1);

	cout << "? " << pos.size() << endl;

	int prev = pos.size();

	int answer;
	cin >> answer;

	bool broken = false;

	while(pos.size() > 1)
	{
		int current = pos[(pos.size() / 2)];
		cout << "? " << current << endl;
		cin >> answer;

		if (answer == 1)
		{
			pos.resize(abs(prev - current));
		}
		else
		{
			pos.erase(pos.begin(), pos.begin() + (pos.size() / 2));
		}

		prev = current;
	}
	if (!broken) cout << "= " << pos[0] << endl;

	return 0;
}

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