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DIVSUM - Divisor Summation |
Given a natural number n (1 <= n <= 500000), please output the summation of all its proper divisors.
Definition: A proper divisor of a natural number is the divisor that is strictly less than the number.
e.g. number 20 has 5 proper divisors: 1, 2, 4, 5, 10, and the divisor summation is: 1 + 2 + 4 + 5 + 10 = 22.
Input
An integer stating the number of test cases (equal to about 200000), and that many lines follow, each containing one integer between 1 and 500000 inclusive.
Output
One integer each line: the divisor summation of the integer given respectively.
Example
Sample Input: 3 2 10 20 Sample Output: 1 8 22
Warning: large Input/Output data, be careful with certain languages
Added by: | Neal Zane |
Date: | 2004-06-10 |
Time limit: | 3s |
Source limit: | 5000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All |
Resource: | Neal Zane |
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2014-08-01 03:24:09 ashour
it gives me TLE this my code : <snip> could someone tell me why ? Last edit: 2023-03-08 17:56:13 |
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2014-07-11 17:22:37 [Lakshman]
@Mehmet Inal I think there is already another tutorial version with 10^6 test cases and tight time limit. http://www.spoj.com/problems/CHKL/ and we have DIVSUM2 in classical as well. |
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2014-07-11 16:42:01 mehmetin
Would it be possible that another version of this problem be put in classical section with tighter time limit and more test cases maybe? Or if there is such a version, which one is it? |
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2014-06-16 05:39:17 Aakash Gupta
for 1 its 0 :) |
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2014-05-29 14:18:35 Sumit Mishra
what answer expected if input is 1 ? |
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2014-05-21 10:25:49 Mayur Aggarwal
How can I verify why my soultion is giving wrong answer, anymethod to get test case for which wrong answer coming --ans(Francky)--> It is easy to build a brute-force solution (slower but correct) and compare with home made random cases (+ all small cases). It's a method to be used with most of problems. Good luck. Last edit: 2014-05-21 10:53:32 |
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2014-05-21 10:03:03 Mayur Aggarwal
My code is also giving wrong answer, can anybody tell me the expected outputs for numbers 1 and the numbers which divisible by themself only ? Any help would be appriciated |
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2014-05-19 20:38:05 p@dfoot
Do we have to specify the number of inputs? |
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2014-05-05 22:22:44 Kaushik
Nice question..! Used O(sqrt(N)) TLE Used Sieve, resolved TLE... but WA :P Now AC. :) |
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2014-04-11 16:32:10 anon
i was happy doing this in first attempt but later on realized it was a tutorial question :( |