You are given an array/list ARR consisting of N integers. Your task is to find all the distinct triplets present in the array which adds up to a given number K.

Given a string S containing digits from 2 to 9 inclusive. Your task is to find all possible letter combinations that the number could represent.

You are given an integer 'N'. For a given 'N' x 'N' chessboard, find a way to place 'N' queens such that no queen can attack any other queen on the chessboard.

You are given a string ‘STR’. Your task is to find the shortest palindrome that can be formed by adding characters in front of ‘STR’.

For example:

You are given a sorted integer array' ARR' of size 'N'. You need to remove the duplicates from the array such that each element appears only once. Return the length of this new array.

Given an ‘N’ x ‘M’ integer matrix, if an element is 0, set its entire row and column to 0's, and return the matr...

You are given a 2D board(N rows and M columns) of characters and a string “word”. Your task is to check if the ...