芝兰生于深谷，不以无人而不芳

class Solution(object): def convertToBase7(self, num): """ :type num: int :rtype: str """ res= "" flag = 0 if num == 0: return "0

Write a program that outputs the string representation of numbers from 1 to n.But for multiples of three it should output “Fizz” instead of the number and for the multiples of five output “Buzz”. For n

You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1’s elements in the corresponding places of nums2.The

class Solution(object): def canConstruct(self, ransomNote, magazine): """ :type ransomNote: str :type magazine: str :rtype: bool """ magazine_k_v = {

#coding=utf-8import stringclass Solution(object): def firstUniqChar(self, s): """ :type s: str :rtype: int """ k_v = {} t = [s.find(i) for i in str

#coding=utf-8class Solution(object): def minMoves(self, nums): """ :type nums: list[int] :rtype: int """ #该问题与每次自减一个元素，等价 res = 0 m = min(nu

You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is completely s

You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 stones. The one who removes the last stone will be the

Given a binary array, find the maximum number of consecutive 1s in this array.Example 1: Input: [1,1,0,1,1,1] Output: 3 Explanation: The first two digits or the last three digits are consecutive 1s.

Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once.Find all the elements of [1, n] inclusive that do not appear in this array.Could you

Given a word, you need to judge whether the usage of capitals in it is right or not.We define the usage of capitals in a word to be right when one of the following cases holds:All letters in this word

# Definition for singly-linked list.class ListNode(object): def __init__(self, x): self.val = x self.next = Noneclass Solution(object): def deleteNode(self, node): """

Given a List of words, return the words that can be typed using letters of alphabet on only one row’s of American keyboard like the image below.Example 1: Input: [“Hello”, “Alaska”, “Dad”, “Peace”] O

Given two strings s and t which consist of only lowercase letters.String t is generated by random shuffling string s and then add one more letter at a random position.Find the letter that was added in

# Definition for a binary tree node.class TreeNode(object): def __init__(self, x): self.val = x self.left = None self.right = Noneclass Solution(object): def invert

# coding=utf-8class Solution(object): def getSum(self, a, b): """ :type a: int :type b: int :rtype: int """ MAX_INT = 0x7FFFFFFF MIN_INT = 0

class Solution(object): def addDigits(self, num): """ :type num: int :rtype: int """ while num % 10 != num: s = str(num) num = sum([i

import mathclass Solution(object): def constructRectangle(self, area): """ :type area: int :rtype: list[int] """ #x^2=area x = math.sqrt(area)

class Solution(object): def moveZeroes(self, nums): """ :type nums: list[int] :rtype: void Do not return anything, modify nums in-place instead. """ i,j= 0,

class Solution(object): def findRelativeRanks(self, nums): """ :type nums: list[int] :rtype: list[str] """ origin_nums = nums[:] nums.sort()

class Solution(object): def findContentChildren(self, g, s): """ :type g: list[int] :type s: list[int] :rtype: int """ res = 0 g.sort()

Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.You may assume that the array is non-empty and the majority element always

Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1, b1), (a2, b2), …, (an, bn) which makes sum of min(ai, bi) for all i from 1 to n as large as possibl

Excel Sheet Column Title Total Accepted: 18284 Total Submissions: 103291 My Submissions Question Solution Given a positive integer, return its corresponding column title as appear in an Excel sheet.F

class Solution {public:double pow(double x,int n){ if(n<0)return 1.0/power(x,-n); return power(x,n); } double power(double x, int n) { if(n == 0) return 1; double temp =

The gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integer n representing the total number of bits in the code, print the sequence of

又是一个八皇后问题：Given an integer n, return all distinct solutions to the n-queens puzzle.Each solution contains a distinct board configuration of the n-queens' placement, where 'Q' and '.' both

Follow up for N-Queens problem.Now, instead outputting board configurations, return the total number of distinct solutions.这个比N-Queens简单点，但还是一样的class Solution {public: int totalNQ

Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically

Reverse Bits Total Accepted: 8148 Total Submissions: 29905 My Submissions Question Solution Reverse bits of a given 32 bits unsigned integer.For example, given input 43261596 (represented in binary a

Same Tree Total Accepted: 52651 Total Submissions: 125166 My Submissions Question Solution Given two binary trees, write a function to check if they are equal or not.Two binary trees are considered e

Number of 1 Bits Total Accepted: 10567 Total Submissions: 28552 My Submissions Question Solution Write a function that takes an unsigned integer and returns the number of ’1’ bits it has (also known

Reverse Integer Total Accepted: 61132 Total Submissions: 219035 My Submissions Question Solution Reverse digits of an integer.Example1: x = 123, return 321 Example2: x = -123, return -321click to sh

Rotate Array Total Accepted: 12759 Total Submissions: 73112 My Submissions Question Solution Rotate an array of n elements to the right by k steps.For example, with n = 7 and k = 3, the array [1,2,3,

Best Time to Buy and Sell Stock II Total Accepted: 41127 Total Submissions: 108434 My Submissions Question Solution Say you have an array for which the ith element is the price of a given stock on da

LeetCode Single Number

Excel Sheet Column Number Total Accepted: 19547 Total Submissions: 52851 My Submissions Question Solution Related to question Excel Sheet Column TitleGiven a column title as appear in an Excel sheet,

Remove Duplicates from Sorted Array Total Accepted: 52196 Total Submissions: 165553 My Submissions Question Solution Given a sorted array, remove the duplicates in place such that each element appear

Remove Duplicates from Sorted Array II Total Accepted: 32492 Total Submissions: 105872My SubmissionsQuestion Solution Follow up for "Remove Duplicates":What if duplicates are a

Find Minimum in Rotated Sorted Array Total Accepted: 38126 Total Submissions: 115306 My Submissions Question Solution Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e.,