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
hide comments
Prateek Agarwal:
2015-12-04 08:38:54
Wthout memoization! |
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Anubhav Gupta:
2015-10-02 05:25:28
Awesome question!!! |
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Harsh Vardhan Ladha:
2015-09-09 09:28:14
My 100th :D
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Apoorv Dwivedi:
2015-08-28 01:00:20
why is recursion better than dp for this question?
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Rishabh Joshi:
2015-06-14 20:39:28
Nice Problem.
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Rishit Sanmukhani:
2015-06-11 11:31:48
1. Simple recursion works.
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Shubham Jadhav:
2015-05-10 21:01:33
simple recursion without memoization works.. |
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GAURAV CHANDEL:
2015-04-28 15:01:46
dp needs practice... |
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Mauro Persano:
2014-12-24 02:26:55
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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Infinity:
2014-10-29 08:36:37
DP would be a bad choice here if you want the best :P
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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 |