Submit | All submissions | Best solutions | Back to list |
POWPOW - Power with Combinatorics |
Your task is to find a^(exp^(b)),
a: Provided in input,10^5 => a >= 0
b: Provided in Input,10^5 => b >= 0
exp=(nC0)^2 + (nC1)^2 +(nC2)^2+ ... +(nCn)^2,
n: Provided in the input, 10^5 => n >= 0
As the answer can be too large , you need to output modulo 10^9+7.
nCr denotes n choose r.
Input
The first line of each input file contains number of test cases t (t<=1000).
Then follow a new line.
Then follow t lines, each containing 3 integers, (i.e. a b n in order) each of them separated by a space.
Output
Output Contains t lines, ith line contains the answer of the ith test case .
Example
Input: 1 1 1 1 Output: 1
Explanation
In First test case, the Value of exp is 2, value of 1^(2^1) is 1, so output is 1.
Added by: | devu |
Date: | 2012-07-13 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | Own |
hide comments
|
||||||
2013-09-04 04:42:20 Rajesh Kumar
huuhhhh... Finally DOne... After about 10 WA's.. NicE Question :) Re:Thanks for ur appreciation,u may now try for the harder version, http://www.spoj.pl/problems/POWPOW2/ Last edit: 2012-07-16 13:30:27 |
||||||
2013-09-04 04:42:20 Shaily Mittal
Can you provide some more test cases for big values og a,b and n? Re:Write a brute force code and find it for yourself. :) Last edit: 2012-07-16 04:45:37 |
||||||
2013-09-04 04:42:20 Himanshu Srivastava
is there any special case....why i get wrong answer at running judge 8?? Re:No Special test cases at all.. Last edit: 2012-07-15 18:21:55 |
||||||
2013-09-04 04:42:20 Mitch Schwartz
@Devendra: Thanks for your response. But for me the original version of the problem is more interesting. I don't know how you feel about it -- whether you would be willing to change it back to a^b^exp (but with corrected test data), or maybe have a^b^exp version added as a separate problem. If you can't solve a^b^exp version at this time, maybe I could add it (I haven't solved it yet, but I know a way), although I prefer to be able to compete on it. Also I think it's worth reiterating Francky's earlier comment about whether the time limit is appropriate for slower languages like Python. What do you think? Re:Earlier Version of the problem is added ,u can attempt it http://www.spoj.pl/problems/POWPOW2/ Last edit: 2012-07-14 16:43:23 |
||||||
2013-09-04 04:42:20 devu
@Francky,Mitch Schwartz:Thanks for pointing out the error,actually i thought for a^(exp^b) bt what lead me to calculate a^(b^exp) with same logic has no explanation,I apologize to all the users who put up their valuable time to solve that one,I hope that this one is a correct one. |