Author: SJ

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Check if the given binary tree is Full or not.

Objective: Given a binary tree, write an algorithm to check if the tree is Full or not. Full binary tree:  A binary tree T is full if each node is either a leaf or...

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Check if Graph is Bipartite – Adjacency List using Depth-First Search(DFS)

Objective: Given a graph represented by the adjacency List, write a Depth-First Search(DFS) algorithm to check whether the graph is bipartite or not. Earlier we have solved the same problem using Adjacency Matrix (Check...

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Longest substring with at most K unique characters

Objective: Given a string, write an algorithm to find the longest substring with at most K characters. Example: Input: aabbaacdeeeeddded, K = 3 Output: Longest substring with 3 most unique characters is: cdeeeeddded with...

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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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Sort a given stack – Using Recursion

Objective: Given a stack of integers, write an algorithm to sort the stack using recursion.  Example: Original Stack: [14, 9, 67, 91, 101, 25] Sorted Stack: [9, 14, 25, 67, 91, 101] Original Stack:...

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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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Determine the given routing number belong to which bank

Objective: Given the banks and range of routing numbers for each bank. You have given a routing number, write a program to determine which bank it belongs to. Input: Given a list of routing...

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Check if interval is covered in given coordinates

Objective: Given 1-D list of coordinates, (x1, x2), (x3, x4), , , ,(xn-1, xn)and interval (a, b). Write an algorithm to determine if interval (a,b) is covered in the list of coordinates. Example: Coordinates...

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Lexicographically previous permutation With One swap

Objective: Given an array of integers (in particular order or permutation of a set of numbers), write an algorithm to find the lexicographically previous permutation of the given permutation with only one swap.  This...

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