n, k = map(int, input().split())
d = [int(i)-1 for i in input().split()]

for i in range(n):
    while d[i] != i:
        d[d[i]], d[i] = d[i], d[d[i]]
        k -= 1

print(['NO', 'YES'][k >= 0 and k % 2 == 0])