import math
import sys
def S(): return sys.stdin.readline().rstrip()
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int, sys.stdin.readline().rstrip().split())
def LI(): return list(map(int, sys.stdin.readline().rstrip().split()))
def LS(): return list(sys.stdin.readline().rstrip().split())

a = I()
b = I()
c = I()

if math.ceil(a/b)*2 >= math.ceil(a/c)*3:
    print("YES")
else:
    print("NO")