Leetcoder

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...

Given two  sparse matrices   A  and  B , return the result of  AB . You may assume that  A 's column number is equal to  B 's row...

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 profit. ...

Additive number is a string whose digits can form additive sequence. A valid additive sequence should contain at least three numbers. Ex...

A 2d grid map of  m  rows and  n  columns is initially filled with water. We may perform an  addLand  operation which turns the water at po...