let nextLevel = Int(readLine()!)!

let itemValue = Int(readLine()!)!

let mul150per = Int(readLine()!)!

let itemCount = nextLevel / itemValue + min(1, nextLevel % itemValue)

let mulItemCount = itemCount * 2 / 3

if(mulItemCount*mul150per>=nextLevel) {
    print("YES")
} else {
    print("NO")
}