摘要：
Numbers With Same Consecutive Differences (M) 题目 Return all non-negative integers of length N such that the absolute difference between every two cons 阅读全文
摘要：
Distribute Candies to People (E) 题目 We distribute some number of candies, to a row of n = num_people people in the following way: We then give 1 candy 阅读全文
摘要：
Best Time to Buy and Sell Stock III (H) 题目 Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm 阅读全文
摘要：
Best Time to Buy and Sell Stock II (E) 题目 Say you have an array prices for which the ith element is the price of a given stock on day i. Design an alg 阅读全文
摘要：
Longest Palindrome (E) 题目 Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be buil 阅读全文
摘要：
Iterator for Combination (M) 题目 Design an Iterator class, which has: A constructor that takes a string characters of sorted distinct lowercase English 阅读全文
摘要：
Pascal's Triangle II (E) 题目 Given a non-negative index k where k ≤ 33, return the \(k^{th}\) index row of the Pascal's triangle. Note that the row ind 阅读全文
摘要：
Excel Sheet Column Number (E) 题目 Given a column title as appear in an Excel sheet, return its corresponding column number. For example: A -> 1 B -> 2 阅读全文
摘要：
Rotting Oranges (M) 题目 In a given grid, each cell can have one of three values: the value 0 representing an empty cell; the value 1 representing a fre 阅读全文
摘要：
Path Sum III (M) 题目 You are given a binary tree in which each node contains an integer value. Find the number of paths that sum to a given value. The 阅读全文