Submit | All submissions | Best solutions | Back to list |
SELFDESN - Self Descriptive Number |
A positive integer m is called "self-descriptive" in base b, where b≥2 and b is an integer, if:
i) The representation of m in base b is of the form (a0a1...ab-1)b
(that is m=a0bb-1+a1bb-2+...+ab-2b+ab-1, where 0≤ai≤b-1 are integer)
ii) ai is equal to the number of occurrences of number i in the sequence (a0a1...ab-1).
For example, (21200)5 is "self-descriptive" in base 5, because it has five digits and contains two 0s, one 1s, two 2s, and no (3s or 4s).
(21200)5 = (1425)10 so 1425 is "self-descriptive" number.
Given n (1 ≤ n ≤1018) and m (1 ≤ m ≤ 109), your task is to find the n-th smallest "self-descriptive" number.
Input
The first line there is an integer T (1 ≤ T ≤ 105).
For each test case there are two integers n and m written in one line, separated by a space.
Output
For each test case, output the n-th smallest "self-descriptive" number, (output the number in base 10) modulo m.
Example
Input: 2 1 1000 2 1000 Output: 100 136
Explanation
100 is "self descriptive" number in base 4: (1210)4
136 is "self descriptive" number in base 4: (2020)4
Time limit ~230x My program speed: Click here to see my submission history and time record for this problem
Added by: | Tjandra Satria Gunawan |
Date: | 2013-04-28 |
Time limit: | 25s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | IMC 2009 + My Idea to modify that problem |
hide comments
2017-03-02 15:21:59
edited. thanks Last edit: 2017-03-06 04:30:46 |
|
2013-05-10 22:54:29 Michael Kharitonov
Can you prove that there are no nontrivial self-descriptive numbers? Ans(Tjandra): of course ;-) Last edit: 2013-05-11 05:21:02 |