#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>

//#include<bits/stdc++.h>


using namespace std;


int a[200005];
int main() {

	

	long long int n, m;
	cin >> n >> m;
	long long int s = 0;
	
	for (int i = 0; i < n; i++) {
		cin >> a[i];
		a[i]--;
	}
	
	for (int i = 0; i < n; i++) {
		while(a[i] != i){
			swap(a[i], a[a[i]]);
			s++;
		}
	}
	
	s -= m;
	if (s < 0&&s!=-m || s % 2) {
		cout << "NO" << endl;
	}
	else cout << "YES" << endl;
	return 0;
}