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

# x = a / b
# y = a / c
# if y/x <= 2/3:
#     print('YES')
# else:
#     print('NO')

x = (a + b - 1) // b
y = (a + c - 1) // c
if 3*y <= 2*x:
    print('YES')
else:
    print('NO')