package main

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

var s = bufio.NewScanner(os.Stdin)

func next() string {
	s.Split(bufio.ScanWords)
	s.Scan()
	return s.Text()
}

func nextInt() int {
	i, e := strconv.Atoi(next())
	if e != nil {
		panic(e)
	}
	return i
}
func nextLong() int64 {
	i, e := strconv.ParseInt(next(), 10, 64)
	if e != nil {
		panic(e)
	}
	return i
}

func main() {
	N := nextInt()
	M := nextInt()
	_ = nextInt()

	out := "YES"
	if N*M == 2 {
		//nop
	}else if (N == 1 || M == 1 || N%2 == 1 && M%2 == 1) {
		out = "NO"
	}else {
		//nop
	}
	fmt.Println(out)

}