N=int(input())
A=list(map(int,input().split()))

X=[0]*(10**6+1)

for a in A:
    X[a]=1

DP=[1]*(10**6+1)

for i in range(1,10**6+1):
    if X[i]==1:
        for j in range(i+i,10**6+1,i):
            if X[j]==1:
                DP[j]=max(DP[i]+1,DP[j])

print(max(DP))