package main

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

func main() {
	var n, k int
	_, _ = fmt.Scan(&n, &k)
	l := make([]int, n)

	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)

	for i := range l {
		sc.Scan()
		l[i], _ = strconv.Atoi(sc.Text())
	}

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

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