The Mindscaping Inc.

Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must mak...

You are given an integer array  nums  and you have to return a new  counts  array. The  counts  array has the property where  counts[i]  is...

Write a program to find the n th  super ugly number. Super ugly numbers are positive numbers whose all prime factors are in the given pri...

Given  n  balloons, indexed from  0  to  n-1 . Each balloon is painted with a number on it represented by array  nums . You are asked to bu...

For a undirected graph with tree characteristics, we can choose any node as the root. The result graph is then a rooted tree. Among all pos...

Say you have an array for which the  i th  element is the price of a given stock on day  i . Design an algorithm to find the maximum prof...

Given an integer array  nums , find the sum of the elements between indices  i  and  j  ( i  ≤  j ), inclusive. The  update(i, val)  funct...