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


if a%b==0:
    x=a//b
elif a%b!=0:
    x=a//b+1

if a%c==0:
    y=a//c

elif a%c!=0:
    y=a//c+1


if 2*x>=3*y:
    print("YES")
elif 2*x<3*y:
    print("NO")