def yourname(N, K, D):
    iniD = [n for n in range(1, N + 1)]
    for i in range(len(D)):
        d = D[i]
        if iniD[i] == d:
            continue
        else:
            idx = iniD.index(d)
            iniD[i], iniD[idx] = iniD[idx], iniD[i]
            K -= 1
    if K >= 0:
        if K % 2 == 0:
            return 'YES'
        else:
            return 'NO'
    else:
        return 'NO'

def main():
    N, K = map(int, input().split())
    D = list(map(int, input().split()))
    print(yourname(N, K, D))

if __name__ == '__main__':
    main()