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EASYFACT - Easy Factorials |
Finding factorials are easy but they become large quickly that is why Lucky hate factorials. Today he have another task related to factorials.
For a given number n how many ways factorial n can expressed as a sum of two or more consecutive positive integers. Can you help lucky ?
Input
First line contains single integer T < 5001, next T lines followed by an integer N<10^8 and M<10^9.
where M is a prime number.
Output
Print the desired result mod M.
Example
Input: 1 3 7 Output: 1
Explanation:: 3! = 1+2+3 only one way.
Speed Adicts My best time for all cases is 1.57s. Best of Luck have fun:) .
Added by: | [Lakshman] |
Date: | 2015-05-13 |
Time limit: | 5s-10s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 JS-MONKEY |
hide comments
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2015-05-27 20:24:11 goyal
give some other test cases |
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2015-05-25 06:56:26 The next big thing
Nice problem.....got ac, but still 4 times slower than you....any tips for speeding up? --(Lakshman)--> My algorithm is different from others. Fast p***e computation, Fast I/O, less memory usage. Last edit: 2015-05-25 16:09:30 |
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2015-05-20 18:22:51 tech_phobic
The final answer has to be taken mod with M ? --Lakshman-->Yes. Last edit: 2015-05-20 21:10:40 |
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2015-05-20 02:06:26 simararorarox9
Awesome problem. Big Like. (Y) --Lakshman-->Thanks Last edit: 2015-05-20 14:12:03 |
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2015-05-20 01:00:32 simararorarox9
Hey [Lakshman] Can you say whether my approach is correct or not. ? Last edit: 2015-05-20 02:06:58 |
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2015-05-17 06:17:54 saksham agrawal
Why are we entering M?? --Lakshman-->Because answer will not fit into 64 bit integer. Last edit: 2015-05-17 08:23:20 |
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2015-05-14 13:30:49 Jan Kowalski
Could You perphaps provide correct result for n=8 ? --Lakshman->No other test case will be provided. Last edit: 2015-05-14 14:04:49 |
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2015-05-14 12:10:41 [Lakshman]
@RIVU DAS I can't give you the complexity details because it will give some hint of solution. Last edit: 2015-05-14 16:37:33 |
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2015-05-14 11:00:02 RIVU DAS
Expected complexity for this question?? |