Trapping Rain Water Leetcode Problem Question: Given n non-negative integers representing an elevation map where the w…

Frog Jump Leetcode Problem A frog is crossing a river. The river is divided into some number of units, and at each un…

Two Sum Leetcode Problem Given an array of integers nums and an integer target, return indices of the two numbers such …

What Is a Graph? Graph is probably the data structure that has the closest resemblance to our daily life. There are man…

Design a data structure that follows the constraints of a   Least Recently Used (LRU) cache . Implement the  LRUCache…

Google’s team-based programming competition, Hash Code, allows you to share your skills and connect with other coders a…