n,k=map(int,input().split())
d=list(map(lambda x: x-1, map(int,input().split())))
cnt=0
for i in range(n):
    j = d[i]
    if i == j: continue
    cnt+=1
    d[j] = d[i]
print("YES" if cnt == k or abs(cnt-k)&1==0 else "NO")