import math
import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    a = int(input())
    b = int(input())
    c = int(input())

    d = (a+b-1)//b
    e = (a+c-1)//c

    print('YES' if 2*d >= 3*e else 'NO')


if __name__ == '__main__':
    main()