package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
	"strings"
)

// utils ///////////////////////////////
func readStdin() string {
	in := bufio.NewReader(os.Stdin)
	s, _ := in.ReadString('\n')
	return strings.TrimSuffix(s, "\n")
}

func readInt() int {
	s := readStdin()
	i, _ := strconv.Atoi(s)
	return i
}

func readFloat64() float64 {
	i := readInt()
	return float64(i)
}
////////////////////////////////////////

func main() {
	a := readFloat64()
	b := readFloat64()
	c := readFloat64()

	normal := math.Ceil(a / b)
	campaign := math.Ceil(a / c)
	n2 := (normal / 3) * 2

	if n2 >= campaign {
		fmt.Println("YES")
	} else {
		fmt.Println("NO")
	}
}