摘要：问题描述 Given n non-negative integers a1, a2, ..., an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). Find... 阅读全文

摘要：题目 Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", which the l 阅读全文

摘要：题目 You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a sing 阅读全文

摘要：题目 Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have 阅读全文

摘要：题目 Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operator 阅读全文

摘要：题目 Given an integer matrix, find the length of the longest increasing path. From each cell, you can either move to four directions: left, right, up or 阅读全文

摘要：问题： Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example:Given nums = [-2, 0, 3, -5, 2, -1] sumRange(0, 2) -> 1 sumRange(2, 5) -> -1 sumRang... 阅读全文