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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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2021-05-25 20:36:53
No need to use DP here. Backtracking solution works for me. |
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2020-11-23 19:43:57
Bottom-up solution was a challenge for me |
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2020-03-30 20:54:12
Easy DP Last edit: 2020-03-30 21:21:08 |
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2020-01-19 17:15:04
easy peasy lemon squeezy AC in one go!!!!!!!!! |
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2019-05-27 12:17:30
it is a backtracking problem with memoization |
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2019-02-26 17:39:36
dont need to memorize. Just get the concept (example in the question helps) and recursion; |
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2018-12-29 09:20:09
this is not a dp problem.. |
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2018-07-18 19:18:46
similar to this:- https://www.spoj.com/problems/ROCK/ |
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2018-06-16 10:19:29
Hey can anyone give any corner case? I tried many testcases including string length 25 and even compared it with actual output from spoj toolkit but WA. :( Edit: NVM got AC. Dp work fine. Hint: Complexity : O(n^2*max_sum) Last edit: 2018-06-16 10:24:08 |
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2018-03-17 10:17:30
Nice one , solved using backtracking , AC in 1 go |