#include <stdio.h>
#include <stdlib.h>

int main()
{
	int ret;
	int K,A,B,i;
	int hit = 0;
	ret = scanf("%d", &K);
	ret = scanf(" %d %d", &A, &B);

	for (i = A; i <= B ; i++) {
		if (i % K == 0)
			hit = 1;
	}
	
	if (hit)
		printf("YES\n");
	else
		printf("NO\n");
	fflush(stdout);
	return EXIT_SUCCESS;
}
