Problem statementGiven a triangular structure of numbers, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.ExampleIf input is −   5   7 3  8 1 2 9 6 4 5Then minimum sum is 13 as follows −5 + ... Read More

Problem statementGiven a binary tree in which each node element contains a number. The task is to find the minimum possible sum from one leaf node to another.ExampleIn above tree minimum sub path is -6 as follows: (-4) + 3 + 2 + (-8) + 1AlgorithmThe idea is to maintain ... Read More

DescriptionGiven an array of digits which contains values from 0 to 9. The task is to find the minimum possible sum of two numbers formed from digits of the array. Please note that we have to use all digits of given arrayExampleIf input array is {7, 5, 1, 3, 2, ... Read More

Problem statementGiven a binary matrix of N rows and M columns. The operation allowed on the matrix is to choose any index (x, y) and toggle all the elements between the rectangle having top-left as (0, 0) and bottom-right as (x-1, y-1). Toggling the element means changing 1 to 0 ... Read More

Problem statementGiven a set of n integers, perform minimum number of operations (you can insert/delete elements into/from the set) to make the MEX of the set equal to x (that is given).Note − The MEX of a set of integers is the minimum non-negative integer that doesn’t exist in it. ... Read More

Problem statementWe are given an array of n elements. The task is to make XOR of whole array 0. We can do following to achieve this.We can select any one of the element −After selecting element, we can either increment or decrement it by 1.We need to find the minimum ... Read More

Problem statementGiven an array arr[] of positive numbers, find minimum number of sets in array which satisfy following property, A set can contain maximum two elements in it. The two elements need not to be contiguous.Sum of elements of set should be less than or equal to given Key. It ... Read More

Problem statementGiven N questions and K options for each question, where 1

Problem statementGiven values of A and B, find the minimum positive integer value of X that can be achieved in the equation X = P*A + Q*B, Here P and Q can be zero or any positive or negative integer.ExampleIf A = 2 and B = 4 then answer will ... Read More

Problem statementYou are given an array of n integer and an integer K. Find the number of total unordered pairs {i, j} such that absolute value of |ai + aj – k| is minimal possible where i != j.ExampleIf arr[ ] = {0, 4, 6, 2, 4} and k = ... Read More