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ANARC05H - Chop Ahoy! Revisited! |
Given a non-empty string composed of digits only, we may group these digits into sub-groups (but maintaining their original order) if, for every sub-group but the last one, the sum of the digits in a sub-group is less than or equal to the sum of the digits in the sub-group immediately on its right. Needless to say, each digit will be in exactly one sub-group.
For example, the string 635 can only be grouped in one sub-group [635] or in two sub-groups as follows: [6-35] (since 6 < 8.) Another example is the string 1117 which can be grouped in one sub-group [1117] or as in the following: [1-117], [1-1-17], [1-11-7], [1-1-1-7], [11-17] and [111-7] but not any more, hence the total number of possibilities is 7.
Write a program that computes the total number of possibilities of such groupings for a given string of digits.
Input
Your program will be tested on a number of test cases. Each test case is specified on a separate line. Each line contains a single string no longer than 25, and is made of decimal digits only.
The end of the test cases is identified by a line made of the word "bye" (without the quotes.) Such line is not part of the test cases.
Output
For each test case, write the result using the following format:
k. n
where k is the test case number (starting at 1) and n is the result of this test case.
Example
Input: 635 1117 9876 bye Output: 1. 2 2. 7 3. 2
Added by: | psetter |
Date: | 2009-07-05 |
Time limit: | 1s-2s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ERL JS-RHINO NODEJS PERL6 VB.NET |
Resource: | ANARC 2005 |
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2015-12-04 08:38:54 Prateek Agarwal
Wthout memoization! |
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2015-10-02 05:25:28 Anubhav Gupta
Awesome question!!! |
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2015-09-09 09:28:14 Harsh Vardhan Ladha
My 100th :D did with top-down DP! Last edit: 2015-09-09 09:31:29 |
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2015-08-28 01:00:20 Apoorv Dwivedi
why is recursion better than dp for this question? |
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2015-06-14 20:39:28 Rishabh Joshi
Nice Problem. Took size 30 and assumed max of sum is 256. got AC. |
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2015-06-11 11:31:48 Rishit Sanmukhani
1. Simple recursion works. 2. Be careful of input/output format |
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2015-05-10 21:01:33 Shubham Jadhav
simple recursion without memoization works.. |
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2015-04-28 15:01:46 GAURAV CHANDEL
dp needs practice... |
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2014-12-24 02:26:55 Mauro Persano
Very nice problem, but had to filter out non-digit characters from input before my Scheme solution was accepted. Careful with garbage at the end of input lines. :-( |
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2014-10-29 08:36:37 Infinity
DP would be a bad choice here if you want the best :P p.s. i used dp Last edit: 2014-10-29 09:57:39 |