Given an integer array nums, return the number of range sums that lie in [lower, upper] inclusive.Range sum S(i, j) is defined as the sum of the elements in nu...

Say you have an array for which the ith element is the price of a given stock on day i.

Once upon a time Professor Idioticideasinventor was travelling by train. Watching cheerless landscape outside the window, he decided to invent the theme of his ...

Given an index k, return the kth row of the Pascal’s triangle.

Say you have an array for which the ith element is the price of a given stock on day i.

Say you have an array for which the ith element is the price of a given stock on day i.

Say you have an array for which the ith element is the price of a given stock on day i.

Given an unsorted integer array, find the first missing positive integer.

Given an array of integers sorted in ascending order, find the starting and ending position of a given target value.

上一篇我介绍了坐标系与矩阵的应用之一：ECEF与ENU坐标转换的相关的概念。本篇介绍坐标系在动力学中的应用场景，这里则涉及到Denavit-Hartenberg(DH) Algorithm。...