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Language: X-factor Chains
Description Given a positive integer X, an X-factor chain of length m is a sequence of integers, 1 = X0, X1, X2, …, Xm = X satisfying Xi < Xi+1 and Xi | Xi+1 where a | b means a perfectly divides into b. Now we are interested in the maximum length of X-factor chains and the number of chains of such length. Input The input consists of several test cases. Each contains a positive integer X (X ≤ 220). Output For each test case, output the maximum length and the number of such X-factors chains. Sample Input 2 3 4 10 100 Sample Output 1 1 1 1 2 1 2 2 4 6 Source POJ Monthly--2007.10.06, ailyanlu@zsu |
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