# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	a = int(input())
	b = int(input())
	c = int(input())
	A = int((a - 1) // b) + 1
	B = int((a - 1) // c) + 1
	if 3 * B <= 2 * A:
		print("YES")
	else:
		print("NO")




if __name__ == '__main__':
	main()