Given an array of integers, return indices of the two numbers such that they add up to a specific target.

作者：José Correa,Andrés Cristi,Boris Epstein,José A. Soto

Write a program to find the nth super ugly number.

Write a program to check whether a given number is an ugly number.

Write an algorithm to determine if a number is "happy".

Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twice. Find the two elements that appea...

函数应该返回这两个下标值 index1 和 index2，其中 index1 必须小于 index2。

Given an integer array with all positive numbers and no duplicates, find the number of possible combinations that add up to a positive integer target.

Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path.

https://leetcode.com/problems/add-two-numbers/description/