package main

import . "fmt"
import . "strings"

func main() {
	var s string
	Scan(&s)
	switch Count(s,"1") {
		case 2:
		Println("Yes")
		return
		case 0,1:
		Println("No")
		return
	}
	s=TrimLeft(s,"1")
	if Count(s,"1") ==0 {
		Println("Yes")
	} else {
		Println("No")
	}
}