#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vint;
typedef pair<int,int> pint;
typedef vector<pint> vpint;
#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,f,n) for(int i=(f);i<(n);i++)
#define each(it,v) for(__typeof((v).begin()) it=(v).begin();it!=(v).end();it++)
#define all(v) (v).begin(),(v).end()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define chmax(a, b) a = (((a)<(b)) ? (b) : (a))
#define chmin(a, b) a = (((a)>(b)) ? (b) : (a))
const int MOD = 1e9 + 7;
const int INF = 1e9;

int d[200010];
int main(void){
	int n; ll k;
	cin >> n >> k;
	ll wcnt = 0;
	rep(i, n){
		cin >> d[i];
		if(d[i] != i + 1) wcnt++;
	}
	// printf("%lld\n", wcnt);
	if(wcnt % 2 == 1){
		k -= (wcnt / 2) + 1;
	}else{
		k -= wcnt / 2;
	}
	if(k < 0){
		printf("NO\n");
	}else if(k % 2 == 1){
		printf("NO\n");
	}else{
		printf("YES\n");
	}
	return 0;
}