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LAGRANGE - Lagrange’s Four-Square Theorem |
The fact that any positive integer has a representation as the sum of at most four positive squares (i.e. squares of positive integers) is known as Lagrange's Four-Square Theorem. The first published proof of the theorem was given by Joseph-Louis Lagrange in 1770. Your mission however is not to explain the original proof nor to discover a new proof but to show that the theorem holds for some specific numbers by counting how many such possible representations there are.
For a given positive integer n, you should report the number of all representations of n as the sum of at most four positive squares. The order of addition does not matter, e.g. you should consider 4^2 + 3^2 and 3^2 + 4^2 are the same representation.
For example, let's check the case of 25. This integer has just three representations 1^2+2^2+2^2+4^2, 3^2 + 4^2, and 5^2. Thus you should report 3 in this case. Be careful not to count 4^2 + 3^2 and 3^2 + 4^2 separately.
Input
The input is composed of at most 255 lines, each containing a single positive integer less than 2^15 , followed by a line containing a single zero. The last line is not a part of the input data.
Output
The output should be composed of lines, each containing a single integer. No other characters should appear in the output. The output integer corresponding to the input integer n is the number of all representations of n as the sum of at most four positive squares.
Example
Input: 1 25 2003 211 20007 0 Output: 1 3 48 7 738
Added by: | Daniel Gómez Didier |
Date: | 2008-11-19 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ERL JS-RHINO |
Resource: | 2008 U.Catolica & U.Central - Circuito de maratones ACIS / REDIS |
hide comments
2016-06-08 04:53:21 DHEERAJ KUMAR
Try this too https://www.codechef.com/problems/CHEFMATH/ |
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2016-06-08 04:51:24 DHEERAJ KUMAR
Wondering how people did this in 0.00 sec. Mine .15 :( |
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2014-12-14 00:54:23 Archangel
I got two TLEs then learnt how to optimize, simple brute force won't pass. |
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2013-12-28 21:03:59 Sourangsu
Sad to see...so few submissions for this problem...quite easy.. |
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2010-04-11 04:34:28 ~!(*(@*!@^&
2^15; not 10^15 |