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.