n,k=map(int,input().split())
d=list(map(lambda x: x-1, map(int,input().split())))

cnt=0
for i in range(n):
    if d[i] == i: continue
    if d[d[i]] == i:
        cnt+=1
        d[d[i]] = d[i]
        d[i] = i
    else:
        cnt+=1

print("YES" if k>=cnt and k&1==cnt&1 else "NO")