N, K = map(int, input().split())
a = tuple(map(int, input().split()))
x = 0
pair = 0
for i, n in enumerate(a, start=1):
    if i == n:
        continue
    if a[n-1] == i:
        pair += 1
    else:
        x += 1
x = max(0, x-1) + pair//2
print("YES" if x <= K and (K-x)%2 == 0 else "NO")