#include<bits/stdc++.h>
using namespace std;

int used[200000];

int main(){
    long long n,k,room;
    cin>>n>>k;
    int d[n];
    room=n;
    for(int i=0; i<n; i++){
        int in;
        cin>>in;
        in--;
        d[i]=in;
    }
    //for(int i=0; i<n; i++)cout<<d[i]<<endl;
    for(int i=0; i<n; i++){
        if(!used[i]){
            if(i==d[d[i]]&&i!=d[i]){
                used[i]=1;
                used[d[i]]=1;
                k--;
                room-=2;
                //cout<<'b'<<endl;
            }
            else if(i==d[i]){
                used[i]=1;
                room--;
                //cout<<'a'<<endl;
            }
        }
    }
    cout<<((k-room>=0&&(k-room)%2==0)?("YES"):("NO"))<<endl;
    //cout<<k<<' '<<room<<endl;
    //for(int i=0; i<n; i++)cout<<d[i]<<endl;
    return 0;
}