n,k = map(int,input().split())
*a, = map(int,input().split())
for i in range(n):
    a[i] -= 1
c = 0
for i in range(n):
    if a[i] < 0: continue
    c += 1
    while a[i] >= 0:
        ni = a[i]
        a[i] = -1
        i = ni
print("YES" if k >= n-c and (k-n+c)%2==0 else "NO")