#include <stdio.h>
int main(void){
    long long int N,K,i,count,tmp;
    scanf("%lld",&N);
    scanf("%lld",&K);
    long long int hairetu[N];
    for(i=1;i<=N;i++)
    {
        scanf("%lld",&hairetu[i]);
    }
    count=0;
    for(i=1;i<=N;i++)
    {
        if(i!=hairetu[i])
        {
            tmp=hairetu[i];
            hairetu[i]=hairetu[tmp];
            hairetu[tmp]=tmp;
            count++;
        }
    }
    if((K-count)%2==0 && K-count>=0)
    {
        printf("YES");
    }
    else
    {
        printf("NO");
    }
}