POWPOW2 - Power with Combinatorics(HARD)
Your task is to calculate a^(b^(exp)).
- 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 input, 10^5 >= n >= 0
Note: The Output for 0^0 should be 1.
nCr denotes n choose r.
As the answer can be too large, you need to output modulo 10^9+7.
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^(1^2) is 1, so output is 1.
Note: First try out the tutorial version where limits are low. POWRTU
Click here to see my set of problems at SPOJ.
hide comments
a_thinker:
2016-07-10 18:04:16
in this problem do we need to take c(0,0) as 1 or 0 ?
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livmic:
2016-03-22 19:32:43
i think your test cases with n=0 have wrong results
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livmic:
2016-03-22 17:19:49
i cant understand why i m getting WA...
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JY:
2015-06-28 13:48:49
@Francky Is the output for the test case you mention
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Lucas Melo:
2014-07-16 22:44:17
My code is running really fast at my computer, about 0.040 sec. I don't understand why I can't pass the time limit. |
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Shaka Shadows:
2013-12-24 00:25:59
Hardest math problem ever faced in my life. Thanks @Devendra Agarwal.
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Joshi Cordova Monroy:
2013-10-24 19:58:19
For
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Miguel Oliveira:
2013-09-04 04:43:08
Spent several days working on this problem and finally got it. This is the hardest problem I ever solved. I had to learn a lot of stuff to do it. Thank you
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Blasters:
2013-09-04 04:43:08
@Sameer I think I am too late to ans that but anyways the ans is 688147711 |
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Blasters:
2013-09-04 04:43:08
Really very awesome problem. The best that I had ever faced with few tricky test cases. I wont spoil the problem by telling those but hint: remember the restriction on any theorem that you use in this problem . Last edit: 2013-06-09 05:44:36 |
Added by: | devu |
Date: | 2012-07-14 |
Time limit: | 0.100s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | Utkarsh Lath |