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Put m balls into n boxes
Can you find all the cases where, if I put 3 balls into 2 boxes the case is 1 1 1 1 1 2 1 ...

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Which permutation is it?
Let write some permutations of positive integers. 1: 1 2 3 4 5 6 ... 2: 2 1 3 4 ... 3: 1 3 2 4 ....

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Create Combination
Motivation: In many problems, we need to create combinations with the function nchoosek. In some cases, however, choices are lim...

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Next lexicographic - permutation
Find next lexicographic - permutation (permutations as it would occur in a dictionary order). E.g: nextP('ABCD') = ABDC If you...

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Repopulate the City
For any population p of positive integers between pmin and pmax, we can calculate histogram count n for a list of evenly dividin...

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Join Strings with Multiple Different Delimiters
The idea is to form the string S by interleaving the elements of a cell array of strings DELIMITER and another cell array of st...

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Simple Decoder Ring
The stereotypical _decoder ring_ is remembered as a cereal box prize from the 1950s. Kids learned about cryptography by startin...

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Is the paranthesis sequence balanced ?
Quantum mechanics and computer science are interested in bra-kets. Today however you, the player, will have to write a function ...

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Alternately upper-lower case
Modify the string to alternate between upper and lower case. For example, s='achyuta' output='AcHyUtA' Update - Test case...

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Eliminate Polysyllabics: Long live short words!
Given a string s1, return s2 in which all the words with more than one syllable have been removed. To make things simple, we ...

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Legend of Zelda - Rupee Count (Item Purchase)
Building off of <https://www.mathworks.com/matlabcentral/cody/problems/3025-zelda-rupee-count Problem 3025>, suppose that an arr...

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Legend of Zelda - Rupee Count
Rupees are the main currency in The Legend of Zelda games. The value of each rupee is determined by its color. Unfortunately, th...

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Prime Letters = Removing
Given a string, remove all the letters which in ASCII Code are prime numbers. For Example: s1 = 'Determine which array e...

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From a given cell array of strings, extract the non-unique strings.
We are given a cell array of strings C. From this cell array we require to extract the subset of non-unique strings, returning t...

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Beauty of Parentheses
Given a string consisting of closed parentheses, form a string array in the following way so that the orders of these parenthese...

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Concatenate string with cell array of strings
Given a cell array of strings (a), a target string (b), and a target position (ind), return a cell array of strings (c) in which...

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Cat, Meowcat and Concatenation
Input is a cell array containing several strings. Find the largest continuous sub-string common to all strings. All strings are ...

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Genome decoding
Inspired by a question on the answer forum: You are given a matrix of 8-bit integers which encodes a genome. Each integer can...

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Find the longest match inside two strings
Given two strings, find the longest string which is contained within both strings. e.g. the longest string that is contained ...

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Broken numlock key, oppps !
The numlock key on my computer is pressed and is now broken, so I cant press it to switch off the numlock mode. And hence I am n...

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longest common semi-substring
Finding longest common substring is a common problem in string processing. This problem is a variant of that. Two strings are g...

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Reverse within string
If input is a string 'yellow' the output should be 'leywol'. Locate the middle of the string and reverse the first (yel) and sec...

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Chain multiplication - 02
Following up on the problem in 55295, you found the number of multiplications needed to multiply two matrices. Now, you are giv...

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Find an optimal placement of coolers on a grid
In a certain chemical plant, 6 new pieces of cooling equipment (coolers) are to be installed in a vacant space. This vacant spac...

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longest common substring : Skipped character version
Two strings are given. Find the longest common substring between them. The substring characters need not be adjacent. They, howe...

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Sub-sequence - 03
Given three sequences, find the length of the longest common subsequence. It is similar to the previous problem -- <https...

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Sub-sequence - 02
Given two sequences, find the length of the longest common subsequence. a=[1,1,1,1,1,2,3,1,4] b=[2,3,0,0,9,5,4,1] longe...

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Sub-sequence - 01
Find the length of the longest increasing subsequence in the given array. a=[2,4,2,1,3,5,6] longest increasing subsequen...

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Is this group simply connected?
Given connectivity information about a graph, your job is to figure out if the graph is fully connected. You are given a list of...

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Word Ladder
Given a set of words, and two other words - start and destination, Find the smallest chain from start to the destination such...

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