// No.1543 [Cherry 2nd Tune A] これがプログラミングなのね
package main

import (
	"fmt"
	"go/token"
	"go/types"
	"strings"
)

func main() {
	var s, t int
	var c string
	fmt.Scan(&s, &t, &c)

	f := func(expr string) (types.TypeAndValue, error) {
		return types.Eval(token.NewFileSet(), types.NewPackage("main", "main"), token.NoPos, expr)
	}

	tv, _ := f(fmt.Sprintf("%d %s %d", s, strings.Replace(c, "=", "==", 1), t))
	if tv.Value.ExactString() == "true" {
		fmt.Println("YES")
	} else {
		fmt.Println("NO")
	}

}