long a[1<<18];i,j,n,k;
main(){
	scanf("%d%d",&n,&k);
	for(i=1;i<=n;i++)scanf("%d",a+i);
	for(j=1;j<=n&&k>=0;j++)if(a[j]!=j){
		i=a[j];
		a[j]=a[i];
		a[i]=i;
	}
	j=!puts(k&1?"NO":"YES");
}