mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    X = list(map(int, input().split()))
    X = set(X)

    A = [1] * (10**6+1)
    for i in range(1, 10**6+1):
        if i in X:
            for j in range(2, 10**6+1):
                if i*j > 10**6:
                    break
                if i*j in X:
                    A[i*j] = max(A[i*j], A[i] + 1)
    print(max(A))


if __name__ == '__main__':
    main()