Algorithms
Smaller Numbers After Self
You are given an integer array A and you have to return a new counts array. The counts array has the property where counts[i] is the number of smaller elements to the right of A[i].
ReadDetecting Arbitrage in Foreign Exchange Markets
Suppose you are given a 2D matrix representing exchange rates between currencies. You want to determine if arbitrage exists in the market (i.e. if there is a way to start with a single unit of some currency C and convert it back to more than one unit of C through a sequence of exchanges).
ReadRegular Expression Matching
Given an input string s and a pattern p, implement regular expression matching with support for '.' and '*'.
ReadThe Skyline Problem
A city's skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. Suppose you are given the locations and height of all the buildings in a cityscape. Write a program to output the skyline formed by these buildings.
ReadValidating K-Palindromes
Given a string s and an integer k, find out if the given string is a k-palindrome or not. A string is a k-palindrome if it can be transformed into a palindrome by removing at most k characters from it.
ReadKth Smallest Element in Two Sorted Arrays
Given two sorted arrays, find the kth smallest element in the array that would be produced if we combined and sorted them. Array elements may be duplicated within and across the input arrays.
ReadOptimising Highway Networks
Write a program which takes an existing highway network (specified as a set of highway sections between pairs of cities) and proposals for new highway sections, and returns the proposed highway section which leads to the most improvement in the total driving distance.
ReadFinding Bridges in a Graph
There are n servers in a network, connected by undirected server-to-server connections. A critical connection is a connection that, if removed, will make some server unable to reach some other server. Find all critical connections.
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