James Pan

原题网址：https://leetcode.com/problems/count-of-range-sum/ 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 su

原题网址：https://leetcode.com/problems/burst-balloons/ 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 burst all t

原题网址：https://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters/ Given a string, find the length of the longest substring T that contains at most 2 distinct characters.