Codeforces 832A Sasha and Sticks

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#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <math.h>
#include <string>
#include <algorithm>

using namespace std;

long long n, k;

int main() {
	scanf("%lld %lld", &n, &k);
	long long ans = n / k;
	if (ans % 2 == 0) {
		printf("NO\n");
	}
	else {
		printf("YES\n");
	}
	return 0;
}