Tag: c++
Task: Design a Data Structure (Container) that supports O(1) constant time in Adding, Removing and Getting a Random Element with Equal Probability. For example: // RandomDS.add(3) // RandomDS.add(4) // …
Given a string, your task is to count how many palindromic substrings in this string. The substrings with different start indexes or end indexes are counted as different substrings …
Given a binary tree, collect a tree’s nodes as if you were doing this: Collect and remove all leaves, repeat until the tree is empty. Example: Input: 1 / …
Given an array A of positive lengths, return the largest perimeter of a triangle with non-zero area, formed from 3 of these lengths. If it is impossible to form …
Given the coordinates of four points in 2D space, return whether the four points could construct a square. The coordinate (x,y) of a point is represented by an integer …
