#coding=UTF-8

a=int(input())
b=int(input())
c=int(input())

#わりかし真面目にやってみるか
normal_req=a//b
if a % b != 0:
    normal_req=normal_req+1
    
boost_req=a//c
if a % c != 0:
    boost_req=boost_req+1

if normal_req * 2 >= boost_req * 3:
    print('YES')
else:
    print('NO')