package main

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

func main() {
	var n, k int
	_, _ = fmt.Scan(&n, &k)

	rdr := bufio.NewReaderSize(os.Stdin, 10000000)
	line, _, _ := rdr.ReadLine()

	l := make([]int, 0)
	for _, c := range strings.Split(string(line), " ") {
		a, _ := strconv.Atoi(c)
		l = append(l, a)
	}

	var cnt int
	sort.Slice(l, func(i, j int) bool {
		if l[i] < l[j] {
			cnt++
			return true
		}
		return false
	})

	// fmt.Println(cnt, k, l)

	if (k-cnt)%2 == 0 {
		fmt.Println("YES")
	} else {
		fmt.Println("NO")
	}
}