Category: Recursion

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Given an array, find all unique subsets with a given sum with allowed repeated digits.

Objective: Given an array of integers and number N, Write an algorithm to find and print all the unique subsets of array for which sum is equal to N where array elements can be...

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Find all subsets of size K from a given number N (1 to N)

Objective: Given two integers N and K, Write an algorithm to find subsets of size K from the numbers 1 to N.  Example: N = 5 K = 3 Output: [1, 2, 3] [1,...

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Find all possible combinations with sum K from a given number N(1 to N) with the repetition of numbers is allowed

Objective: Given two integers N and K, Write an algorithm to find possible combinations that add to K, from the numbers 1 to N.  Condition: An integer from 1 to N can be repeated...

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Given an array, print all unique subsets with a given sum.

Objective: Given an array of integers and number N, Write an algorithm to find and print all the subsets of the array for which sum is equal to N. Example: input [] = {6,2,7,8,2,4,1,3,7,5}...

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Find all unique combinations of numbers (from 1 to 9 ) with sum to N

Objective: Given an integer N, Write an algorithm to select numbers from 1 to 9 and make combinations such that its sum to N.  Example: N= 5 Output:  [1, 4] [2, 3] [5] N...

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Find the number of distinct Islands OR connected components.

Objective: Given a 2d grid map of ‘1’s (land) and ‘0’s (water), count the number of distinct or unique islands. Island: An island is surrounded by water and is formed by connecting adjacent lands...

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Collatz Conjecture – Maximum Steps takes to transform (1, N) to 1.

Objective: Given a number N, write an algorithm to find the maximum number of steps it takes to transform (1, N) to 1 using Collatz Conjecture.  The Collatz conjecture is a conjecture in mathematics...

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Print Stack in reverse order.

Objective: Given a stack, write a program to print the stack elements in reverse order. Example: Approach: Use Temporary stack: Take temporary stack, and copy all the items from the given stack to a...

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Given an array, Print sum of all subsets

Objective: Given an array of numbers, write an algorithm to print all the subsets sum individually.   Example: Given Input: [1, 2] Output: 3 1 2 0 Explanation: subsets are [0], [1], [2], [1, 2]...

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Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N

Objective: Given two integers N and K. Write an algorithm to find all the combinations of k numbers which sum to N.  Conditions:  All K numbers must be between 1 and 9 and unique....

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