ashishranjan2828's blog

http://www.spoj.com/problems/FACTDIV/

By ashishranjan2828, history, 8 years ago, In English

I'm getting tle with normal divisor algorithm. Is there some extra needed concept required for this problem..

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8 years ago, # |
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You should fill a dp ( dp[i] = number of divisors of i) before getting tests.

Then use partial sum on dp and answer each query in O(1).

So similar to 546D - Солдат и игра с числами.

So use a fast input ouput like scanf printf.

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