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