import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

A,B,C = map(int, read().split())

x = (A+B-1) // B
y = (A+C-1) // C

answer = 'YES' if 2*x >= 3*y else 'NO'
print(answer)