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SUBSHARD - Subset and upset (HARD) |
The whole world is crazy about subset sum. We define subset sum as sum of all subparts. A subpart is a number which is obtained by erasing certain digits and arranging the remaining numbers in the same order. You have to calculate the subset sum of the given number. Since the number can be very large return the subset sum modulo m.
For example if the number is 1357, then the various subparts are 1, 3, 5, 7, 13, 15, 17, 35, 37, 57, 137, 135, 157, 357, 1357.
Input
First line contains T (1 ≤ T ≤ 50) denoting the number of test cases.
Next T lines containing two numbers n (0 < n < 101000) and m(1 < m < 109).
Output
Print the subset sum modulo m.
Example
Input: 6 111 9 111 200 456 9 456 1000 1357 1000 1357 5000 Output: 3 147 6 618 333 2333
Time Limit ≈ 2*(My Python 3 Program Top Speed)
Added by: | Tjandra Satria Gunawan |
Date: | 2012-10-03 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | Hard version of NITT5 problem. |
hide comments
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2015-05-31 16:03:34 Rishabh Joshi
Can you please check my solution. O(n) getting TLE. ID - 14362730 or ID - 14362674 |
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2014-06-30 14:59:03 Anmol Garg
My 50th. :D |
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2012-12-25 16:42:50 gabber
Use MOD only where you need it! |
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2012-12-11 09:57:38 R
@author getting SIGABRT my code id is 8237489 plz help similar code got ac in NITT5 Ans: Avoid integer division and modulo by zero Last edit: 2012-12-11 11:22:19 |
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2012-10-12 02:10:15 ♘Prabhat
@Tjandra can you please check my code(ID 7834532) why i'm getting this compilation error /usr/lib/gcc/i486-linux-gnu/4.3.2/../../../../lib/crt1.o: In function `_start': /home/aurel32/tmp/glibc/glibc-2.9/csu/../sysdeps/i386/elf/start.S:115: undefined reference to `main' collect2: ld returned 1 exit status |
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2012-10-11 21:56:48 :D
Yes :) |
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2012-10-09 19:20:17 Alex Anderson
Just confirming, you guys meant O(log n) and O(log^2 n), right? |
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2012-10-08 15:11:56 Problem Solver
Yeah, solved this problem, it's very nice, thanks. |
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2012-10-04 11:49:46 Ehor Nechiporenko
So nice!!! What about codegolf challenge version of the problem? Last edit: 2012-10-04 11:49:59 |
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2012-10-04 11:10:46 (Tjandra Satria Gunawan)(曾毅昆)
I think 1 seconds time limit is the best setting ;-) Congratulations for all that got AC :-) |