N,K = map(int,input().split())
D = [0]+list(map(int,input().split()))
tot = 0
i = 1
while i<N:
    if D[i]==i:
        i += 1
        continue
    j = D[i]
    D[i],D[j] = D[j],D[i]
    tot += 1
if tot>K:
    print("NO")
elif (K-tot)%2==0:
    print("YES")
else:
    print("NO")