Given a positive number N, find all combinations of 2*N elements such that every element from 1 to N appears exactly twice and distance between its two appearances is exactly equal to value of the element.
Given a string and a pattern containing wildcard characters i.e. ‘*’ and ‘?’, where ‘?’ can match to any single character in input string and ‘*’ can match to any number of characters including zero characters, design an efficient algorithm to find if the pattern matches with the complete input string or not.
The longest increasing subsequence problem is to find a subsequence of a given sequence in which the subsequence’s elements are in sorted order, lowest to highest, and in which the subsequence is as long as possible. This subsequence is not necessarily contiguous, or unique.
Given an array of integers, find sub-array in it that has maximum product of its elements.
Given a list containing future prediction of share prices, find maximum profit that can be earned by buying and selling shares any number of times with constraint that a new transaction can only start after previous transaction is complete. i.e. we can only hold at-most one share at a time.
Find maximum amount of water that can be trapped within given set of bars. Assume width of each bar is 1 unit.
Given a schedule containing arrival and departure time of trains in a station, find minimum number of platforms needed in the station so to avoid any delay in arrival of any train.
Given an array of integers, find the maximum sum of subsequence of given array where subsequence contains no adjacent elements.
Given a set of intervals, print all non-overlapping intervals after merging overlapping intervals.
Given a sequence consisting of ‘I’ and ‘D’ where ‘I’ denotes increasing sequence and ‘D’ denotes the decreasing sequence. Decode the given sequence to construct minimum number without repeated digits.
Given two sorted array of integers, find a path involving elements of both arrays whose sum is maximum. We can start from either arrays but we can switch between arrays only through its common elements.
Given an array of integers, find the smallest window in array sorting which will make the entire array sorted in increasing order.
Given an array constructed from another array by taking sum of every distinct pair in it, decode the array to get back the original array elements.
Find largest number possible from set of given numbers. The numbers should be appended to each other in any order to form the largest number.