N=int(input())
X=list(map(int,input().split()))
X.sort(reverse=True)

X_max=X[0]
DP=[0]*(X_max+1)

for x in X:
    m=0
    y=2*x
    while y<=X_max:
        if m<DP[y]:
            m=DP[y]
        y+=x
    DP[x]=m+1

print(max(DP))