Given a mobile keypad having digits from [0-9] associated with each key, count total possible combinations of digits having length n. We can start with any digit and press only four adjacent keys of any digit. Keypad also contains * and # key which we are not allowed to press.
The longest common subsequence (LCS) problem is the problem of finding the longest subsequence that is present in given two sequences in the same order. i.e. find a longest sequence which can be obtained from the first original sequence by deleting some items, and from the second original sequence by deleting other items.
Given an array of integers, find the maximum sum of subsequence of given array where subsequence contains no adjacent elements.
The longest bitonic subarray problem is to find a subarray of a given sequence in which the subarray’s elements are first sorted in in increasing order, then in decreasing order, and the subarray is as long as possible.
Given a binary array, find the index of 0 to be replaced with 1 to get maximum length sequence of continuous ones.
Given an array of integers, find equilibrium index in it.
Given a M x N matrix where each cell can have value of 1, 0 or -1, where -1 denotes a unsafe cell, collect maximum number of ones starting from first cell and by visiting only safe cells (i.e. 0 or 1). We are allowed to go only left or down if the row is …
Given a pattern, count number of times the pattern appears in the given string as a subsequence.
Given an unlimited supply of coins of given denominations, find the minimum number of coins required to get a desired change.
Given a rod of length n, find the optimal way to cut rod into smaller rods in order to maximize product of price of each of the smaller rod. Assume each rod of length i has price i.
Given a rod of length n and list of prices of rod of length i where 1 < = i
Given a positive integer N, count all N-digit binary strings without any consecutive 1’s.
Given a set of positive integers and an integer s, is there any non-empty subset whose sum to s.
Given a set of positive integers, find if it can be divided into two subsets with equal sum.