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2020_April_Leetcode_30_days_challenge
2020_August_Leetcode_30_days_challenge
2020_July_Leetcode_30_days_challenge
2020_June_Leetcode_30_days_challenge
2020_May_Leetcode_30_days_challenge
2020_November_Leetcode_30_days_challenge
2020_October_Leetcode_30_days_challenge
2020_September_Leetcode_30_days_challenge
2021_Feburary_Leetcode_30_days_challenge
Array
Binary Tree
Dynamic_Programming_I
Linked List
No_0001_Two Sum
No_0002_Add Two Numbers
No_0003_Longest Substring Without Repeating Characters
No_0007_Reverse Integer
No_0008_String to Integer_aka_atoi
No_0009_Palindrome Number
No_0011_Contain With Most Water
No_0012_Integer to Roman
No_0013_Roman to Integer
No_0014_Longest Common Prefix
No_0015_3 Sum
No_0016_3 Sum Closet
No_0017_Letter Combinations of a Phone Number
No_0018_4 Sum aka four Sum
No_0019_Remove Nth Node From End of List
No_0020_Valid Parentheses
No_0021_Merge 2 Sorted Lists
No_0023_Merge k Sorted Lists
No_0024_Swap Nodes in Pairs
No_0026_Remove Duplicates from Sorted Array
No_0027_Remove Element
No_0028_Implement strStr
No_0029_Divide Two Integers
No_0032_Longest Valid Parentheses
No_0033_Search in Rotated Sorted Array
No_0034_Find First and Last Position of Element in Sorted Array
No_0035_Search Insert Position
No_0038_Count and Say
No_0039_Combination Sum
No_0040_Combination Sum II
No_0041_First Missing Positive
No_0044_Wildcard Matching
No_0045_Jump Game II
No_0046_Permutations
No_0047_Permutations II
No_0048_Rotate Image
No_0049_Group Anagrams
No_0050_Pow( x , n )
No_0053_Maximum Subarray
No_0055_Jump_Game
No_0056_Merge Intervals
No_0058_Length of Last Word
No_0061_Rotate List
No_0062_Unique Path
No_0063_Unique Paths II
No_0064_Minimum Path Sum
No_0065_Valid Number
No_0066_Plus One
No_0067_Add Binary
- No_67_Add Binary_description.md
- add_binary_by_int_and_fstring.py
No_0069_Sqrt_x
No_0070_Climbing Stairs
No_0071_Simplify Path
No_0073_Set Matrix Zeroes
No_0074_Search a 2D Matrix
No_0078_Subsets
No_0080_Remove Duplicates from Sorted Array II
No_0082_Remove Duplicates from Sorted List II
No_0083_Remove Duplicates from Sorted List
No_0086_Partition List
No_0088_Merge Sorted Array
No_0089_Gray Code
No_0090_Subsets II
No_0092_Reverse Linked List II
No_0094_Binary Tree Inorder Traversal
No_0095_Unique Binary Search Trees II
No_0096_Unique Binary Search Trees
No_0098_Validate Binary Search Tree
No_0100_Same Tree
No_0101_Symmetric Tree
No_0102_Binary Tree Level Order Traversal
No_0104_Maximum Depth of Binary Tree
No_0105_Construct Binary Tree from Preorder and Inorder Traversal
No_0106_Construct Binary Tree from Inorder and Postorder Traversal
No_0107_Binary Tree Level Order Traversal II
No_0108_Convert Sorted Array to Binary Search Tree
No_0109_Convert Sorted List to Binary Search Tree
No_0110_Balanced Binary Tree
No_0111_Minimum Depth of Binary Tree
No_0112_Path Sum
No_0113_Path Sum II
No_0114_Flatten Binary Tree to Linked List
No_0116_Populating Next Right Pointers in Each Node
No_0117_Populating Next Right Pointers in Each Node II
No_0118_Pascal's Triangle
No_0119_Pascal's Triangle II
No_0120_Triangle
No_0121_Best Time to Buy and Sell Stock
No_0122_Best Time to Buy and Sell Stock II
No_0123_Best Time to Buy and Sell Stock III
No_0124_Binary Tree Maximum Path Sum
No_0125_Valid Palindrome
No_0129_Sum Root to Leaf Numbers
No_0136_Single Number
No_0141_Linked List Cycle
No_0142_Linked List Cycle II
No_0144_Binary Tree Preorder Traversal
No_0145_Binary Tree Postorder Traversal
No_0146_LRU Cache
No_0148_Sort List
No_0149_Max Points on a Line
No_0151_Reverse Words in a String
No_0152_Maximum Product Subarray
No_0155_Min Stack
No_0160_Intersection of Two Linked Lists
No_0162_Find Peak Element
No_0167_Two Sum II - Input array is sorted
No_0168_Excel Sheet Column Title
No_0169_Majority Element
No_0171_Excel Sheet Column Number
No_0172_Factorial Trailing Zeroes
No_0173_Binary Search Tree Iterator
No_0175_Combine Two Tables
No_0182_Duplicate Emails
No_0183_Customers Who Never Order
No_0187_Repeated DNA Sequence
No_0188_Best Time to Buy and Sell Stock IV
No_0189_Rotate Array
No_0190_Reverse Bits
No_0191_Number of 1 Bits
No_0192_Word Frequency
No_0193_Valid Phone Numbers
No_0195_Tenth Line
No_0198_House Robber
No_0199_Binary Tree Right Side View
No_0200_Number of Islands
No_0201_Bitwise AND of Number Range
No_0202_Happy Number
No_0203_Remove Linked List Elements
No_0204_Count Primes
No_0205_Isomorphic String
No_0206_Reverse Linked List
No_0207_Course Schedule
No_0215_Kth Largest Element in an Array
No_0217_Contains Duplicate
No_0219_Contains Duplicate II
No_0220_Contains Duplicate III
No_0221_Maximal Square
No_0222_Count Complete Tree Nodes
No_0223_Rectangle Area
No_0225_Implement Stack using Queues
No_0226_Invert Binary Tree
No_0229_Majority Element II
No_0230_Kth Smallest Element in a BST
No_0231_Power of Two
No_0232_Implement Queue using Stacks
No_0234_Palindrome Linked List
No_0235_Lowest Common Ancestor of a Binary Search Tree
No_0236 Lowest Common Ancestor
No_0237_Delete Node in a Linked List
No_0238_Product of Array Except Self
No_0240_Search a 2D Matrix II
No_0242_Valid Anagram
No_0243_Palindrome Linked List
No_0257_Binary Tree Paths
No_0258_Add Digits
No_0264_Ugly Number II
No_0268_Missing Number
No_0274_H Index
No_0275_H Index II
No_0283_Move Zeroes
No_0287_Find the Duplicate Number
No_0289_Game of Life
No_0290_Word Pattern
No_0297_Serialize and Deserialize Binary Tree
No_0299_Bulls and Cows
No_0300_Longest Increasing Subsequence
No_0303_Range Sum Query - Immutable
No_0309_Best Time to Buy and Sell Stock with Cooldown
No_0322_Coin Change
No_0326_Power of Three
No_0328_Odd Even Linked List
No_0329_Longest Increasing Path in a Matrix
No_0332_Reconstruct Itinerary
No_0336_Palindrome Pairs
No_0338_Counting Bits
No_0341_Flatten Nested List Iterator
No_0342_Power of Four
No_0343_Integer Break
No_0344_Reverse String
No_0345_Reverse Vowels of a String
No_0349_Intersection of Two Arrays
No_0350_Intersection of Two Arrays II
No_0367_Valid Perfect Square
No_0371_Sum of Two Integers
No_0372_Super Pow
No_0374_Guess Number Higher or Lower
No_0376_Wiggle Subsequence
No_0377_Combination Sum IV
No_0383_Ransom Note
No_0384_Shuffle an Array
No_0387_First Unique Character in a String
No_0389_Find the Difference
No_0403_Frog Jump
No_0404_Sum of Left Leaves
No_0412_FizzBuzz
No_0414_Third Maximum Number
No_0415_Add Strings
No_0421_Maximum XOR of Two Numbers in an Array
No_0423_Reconstruct Original Digits from English
No_0429_N-ary Tree Level Order Traversal
No_0437_Path Sum III
No_0438_Find All Anagrams in a String
No_0441_Arrangeing Coins
No_0443_String Compression
No_0445_Add Two Numbers II
No_0447_Number of Boomerangs
No_0448_Find All Numbers Disappeared in an Array
No_0449_Serialize and Deserialize BST
No_0450_Delete Node in a BST
No_0451_Sort Characters By Frequency
No_0454_4Sum II aka Four Sum Part II
No_0461_Hamming Distance
No_0463_Island Perimeter
No_0468_Validate IP Address
No_0474_Ones and Zeros
No_0476_Number Complement
No_0478_Generate Random Point in a Circle
No_0482_License Key Formatting
No_0485_Max Consecutive Ones
No_0493_Reverse Pairs
No_0496_Next Greater Element I
No_0500_Keyboard_Row
No_0503_Next Greater Element II
No_0507_Perfect Number
No_0509_Fibonacci Number
No_0513_Find Bottom Left Tree Value
No_0515_Find Largest Value in Each Tree Row
No_0520_Detect Capital
No_0525_Contiguous Array
No_0530_Minimum Absolute Difference in BST
No_0532_K-diff Pairs in an Array
No_0535_Encode and Decode TinyURL
No_0538_Convert BST to Greater Tree
No_0540_Single Element in a Sorted Array
No_0541_Reverse String II
No_0543_Diameter of Binary Tree
No_0554_Brick Wall
No_0557_Reverse Words in a String III
No_0559_Maximum Depth of N-ary Tree
No_0561_Array Partition I
No_0563_Binary Tree Tilt
No_0566_Reshape the Matrix
No_0567_Permutation in String
No_0581_Shortest Unsorted Continuous Subarray
No_0589_N-ary Tree Preorder Traversal
No_0590_N-ary Tree Postorder Traversal
No_0595_Big Countries
No_0599_Minimum Index Sum of Two Lists
No_0605_Can Place Flowers
No_0606_Construct String from Binary Tree
No_0611_Valid Triangle Number
No_0617_Merge Two Binary Trees
No_0620_Not Boring Movies
No_0621_Task Scheduler
No_0622_Design Circular Queue
No_0623_Add One Row to Tree
No_0628_Maximum Product of Three Numbers
No_0633_Sum of Square Numbers
No_0637_Average of Levels in Binary Tree
No_0641_Design Circular Deque
No_0643_Maximum Average Subarray I
No_0645_Set Mismatch
No_0653_Two Sum IV - Input is a BST
No_0654_Maximum Binary Tree
No_0657_Robot Return to Origin
No_0661_Image Smoother
No_0665_Non-decreasing Array
No_0669_Trim a Binary Search Tree
No_0671_Second Minimum Node In a Binary Tree
No_0676_Implement Magic Dictionary
No_0678_Valid Parenthesis String
No_0680_Valid Palindrome II
No_0682_Baseball Game
No_0687_Longest Univalue Path
No_0693_Binary Number with Alternating Bits
No_0697_Degree of an Array
No_0700_Search in a Binary Search Tree
No_0701_Insert into a Binary Search Tree
No_0703_Kth Largest Element in a Stream
No_0704_Binary Search
No_0705_Design HashSet
No_0707_Design Linked List
No_0709_To Lower Case
No_0713_Subarray Product Less Than K
No_0714_Best Time to Buy and Sell Stock with Transaction Fee
No_0717_1-bit and 2-bit Characters
No_0724_Find Pivot Index
No_0728_Self Dividing Numbers
No_0733_Flood Fill
No_0746_Min Cost Climbing Stairs
No_0771_Jewels and Stones
No_0775_Global and Local Inversions
No_0783_Minimum Distance Between BST Nodes
No_0784_Letter Case Permutation
No_0785_Is Graph Bipartite
No_0788_Rotated Digits
No_0794_Valid Tic-Tac-Toe State
No_0797_All Paths From Source to Target
No_0804_Unique Morse Code Words
No_0811_ Subdomain Visit Count
No_0812_Largest Triangle Area
No_0814_Binary Tree Pruning
No_0821_Shortest Distance to a Character
No_0824_Goat Latin
No_0830_Positions of Large Groups
No_0832_Flipping an Image
No_0841_Keys and Rooms
No_0844_Backspace String Compare
No_0846_Hand of Straights
No_0849_Maximize Distance to Closest Person
No_0852_Peak Index in a Mountain Array
No_0856_Score of Parentheses
No_0859_Buddy Strings
No_0860_Lemonade Change
No_0862_Shortest Subarray with Sum at Least K
No_0867_Transpose Matrix
No_0868_Binary Gap
No_0869_Reordered Power of 2
No_0872_Leaf-Similar Trees
No_0876_Middle of the Linked List
No_0878_Nth Magical Number
No_0884_Uncommon Words from Two Sentences
No_0886_Possible Bipartition
No_0890_Find and Replace Pattern
No_0893_Groups of Special-Equivalent Strings
No_0894_All Possible Full Binary Trees
No_0896_Monotonic Array
No_0897_Increasing Order Search Tree
No_0901_Online Stock Span
No_0905_Sort Array By Parity
No_0908_Smallest Range I
No_0912_Sort an Array
No_0914_X of a Kind in a Deck of Cards
No_0916_Word subsets
No_0917_Reverse Only Letters
No_0918_Maximum Sum Circular Subarray
No_0919_Complete Binary Tree Inserter
No_0922_Sort Array By Parity II
No_0923_3Sum with multiplicity
No_0925_Long Pressed Name
No_0929_Unique Email Addresses
No_0931_Minimum Falling Path Sum
No_0933_Number of Recent Calls
No_0938_Range Sum of BST
No_0941_ Valid Mountain Array
No_0942_DI String Match
No_0944_Delete Columns to Make Sorted
No_0949_Largest Time for Given Digits
No_0953_Verifying an Alien Dictionary
No_0958_Check Completeness of a Binary Tree
No_0961_N-Repeated Element in Size 2N Array
No_0965_Univalued Binary Tree
No_0971_Flip Binary Tree to Match Preorder Traversal
No_0974_Subarray Sums Divisible by K
No_0976_Largest Perimeter Triangle
No_0977_Squares of a Sorted Array
No_0978_Longest Turbulent Subarray
No_0980_Unique Paths III
No_0985_Sum of Even Numbers After Queries
No_0986_Interval List Intersections
No_0989_Add to Array-Form of Integer
No_0991_Broken Calculator
No_0993_Cousins in Binary Tree
No_0994_Rotting Oranges
No_0997_Find the Town Judge
No_1002_Find Common Characters
No_1008_Construct Binary Search Tree from Preorder Traversal
No_1009_Complement of Base 10 Integer
No_1013_Partition Array Into Three Parts With Equal Sum
No_1021_Remove Outermost Parentheses
No_1022_Sum of Root To Leaf Binary Numbers
No_1026_Maximum Difference Between Node and Ancestor
No_1029_Two City Scheduling
No_1033_Moving Stones Until Consecutive
No_1037_Valid Boomerang
No_1038_Binary Search Tree to Greater Sum Tree
No_1042_Flower Planting With No Adjacent
No_1046_Last Stone Weight
No_1047_Remove All Adjacent Duplicates In String
No_1051_Height Checker
No_1054_Distant Barcodes
No_1071_Greatest Common Divisor of Strings
No_1074_Number of Submatrices That Sum to Target
No_1078_Occurrences After Bigram
No_1089_Duplicate Zeros
No_1093_Statistics from a Large Sample
No_1095_Find in Mountain Array
No_1108_Defanging IP Address
No_1114_Print in Order
No_1116_Print Zero Even Odd
No_1117_Building H2O
No_1122_Relative Sort Array
No_1123_Lowest Common Ancestor of Deepest Leaves
No_1128_Number of Equivalent Domino Pairs
No_1137_N-th Tribonacci Number
No_1160_Find Words That Can Be Formed by Characters
No_1161_Maximum Level Sum of a Binary Tree
No_1175_Prime Arrangements
No_1184_Distance Between Bus Stops
No_1185_Day of the Week
No_1189_Maximum Number of Balloons
No_1200_Minimum Absolute Difference
No_1201_Ugly Number III
No_1207_Unique Number of Occurrences
No_1209_Remove All Adjacent Duplicates in String II
No_1217_Play with Chips
No_1220_Count Vowels Permutation
No_1221_Split a String in Balanced Strings
No_1232_Check If It Is a Straight Line
No_1237_Find Positive Integer Solution for a Given Equation
No_1250_Check If It Is a Good Array
No_1252_Cells with Odd Values in a Matrix
No_1260_Shift 2D Grid
No_1261_Find Elements in a Contaminated Binary Tree
No_1262_Greatest Sum Divisible by Three
No_1266_Minimum Time Visiting All Points
No_1275_Find Winner on a Tic Tac Toe Game
No_1277_Count Square Submatrices with All Ones
No_1281_Subtract the Product and Sum of Digits of an Integer
No_1282_Group the People Given the Group Size They Belong To
No_1287_Element Appearing More Than 25% In Sorted Array
No_1290_Convert Binary Number in a Linked List to Integer
No_1291_Sequential Digits
No_1295_Find Numbers with Even Number of Digits
No_1296_Divide Array in Sets of K Consecutive Numbers
No_1299_Replace Elements with Greatest Element on Right Side
No_1301_Number of Paths with Max Score
No_1302_Deepest Leaves Sum
No_1304_Find N Unique Integers Sum up to Zero
No_1305_All Elements in Two Binary Search Trees
No_1306_Jump Game III
No_1309_Decrypt String from Alphabet to Integer Mapping
No_1310_XOR Queries of a Subarray
No_1313_Decompress Run-Length Encoded List
No_1314_Matrix Block Sum
No_1315_Sum of Nodes with Even-Valued Grandparent
No_1317_Convert Integer to the Sum of Two No-Zero Integers
No_1323_Maximum 69 Number
No_1324_Print Words Vertically
No_1325_Delete Leaves With a Given Value
No_1331_Rank Transform of an Array
No_1341_The K Weakest Rows in a Matrix
No_1342_Number of Steps to Reduce a Number to Zero
No_1342_Reduce Array Size to The Half
No_1345_Jump Game IV
No_1346_Check If N and Its Double Exist
No_1347_Minimum Number of Steps to Make Two Strings Anagram
No_1348_Tweet Counts Per Frequency
No_1351_Count Negative Numbers in a Sorted Matrix
No_1352_Product of the Last K Numbers
No_1356_Sort Integers by The Number of 1 Bits
No_1362_Closest Divisors
No_1363_Largest Multiple of Three
No_1365_How Many Numbers Are Smaller Than the Current Number
No_1367_Linked List in Binary Tree
No_1370_Increasing Decreasing String
No_1373_Maximum Sum BST in Binary Tree
No_1374_Generate a String With Characters That Have Odd Counts
No_1379_Find a Corresponding Node of a Binary Tree in a Clone of That Tree
No_1381_Design a Stack With Increment Operation
No_1382_Balance a Binary Search Tree
No_1385_Find the Distance Value Between Two Arrays
No_1387_Sort Integers by The Power Value
No_1389_Create Target Array in the Given Order
No_1390_Four Divisors
No_1394_Find Lucky Integer in an Array
No_1395_Count Number of Teams
No_1396_Design Underground System
No_1399_Count Largest Group
No_1403_Minimum Subsequence in Non-Increasing Order
No_1404_Number of Steps to Reduce a Number in Binary Representation to One
No_1408_String Matching in an Array
No_1409_Queries on a Permutation With Key
No_1410_HTML Entity Parser
No_1411_Number of Ways to Paint N × 3 Grid
No_1413_Minimum Value to Get Positive Step by Step Sum
No_1417_Reformat The String
No_1422_Maximum Score After Splitting a String
No_1423_Maximum Points You Can Obtain from Cards
No_1431_Kids With the Greatest Number of Candies
No_1432_Max Difference You Can Get From Changing an Integer
No_1433_Check If a String Can Break Another String
No_1436_Destination City
No_1437_Check If All 1's Are at Least Length K Places Away
No_1446_Consecutive Characters
No_1447_Simplified Fractions
No_1448_Count Good Nodes in Binary Tree
No_1450_Number of Students Doing Homework at a Given Time
No_1451_Rearrange Words in a Sentence
No_1455_Check If a Word Occurs As a Prefix of Any Word in a Sentence
No_1456_Maximum Number of Vowels in a Substring of Given Length
No_1458_Max Dot Product of Two Subsequences
No_1460_Make Two Arrays Equal by Reversing Sub-arrays
No_1464_Maximum Product of Two Elements in an Array
No_1470_Shuffle the Array
No_1480_Running Sum of 1d Array
No_1486_XOR Operation in an Array
No_1491_Average Salary Excluding the Minimum and Maximum Salary
No_1492_The kth Factor of n
No_1496_Path Crossing
No_1502_Can Make Arithmetic Progression From Sequence
No_1504_Count Submatrices With All Ones
No_1512_Number of Good Pairs
No_1513_Number of Substrings With Only 1s
No_1523_Count Odd Numbers in an Interval Range
No_1528_Shuffle String
No_1534_Count Good Triplets
No_1537_Get the Maximum Score
No_1544_Make The String Great
No_1545_Find Kth Bit in Nth Binary String
No_1547_Minimum Cost to Cut a Stick
No_1561_Maximum Number of Coins You Can Get
No_1562_Find Latest Group of Size M
No_1642_Furthest Building You Can Reach
No_1704_Determine if String Halves Are Alike
No_1721_Swapping Nodes in a Linked List
Recursion_Part_I
Top_Interview_Question_Easy
Longest Substring Without Repeating Characters.drawio
1014_Robot Bounded In Circle.drawio
452_Minimum Number of Arrows to Burst Balloons
BestTimeToBuyAndSellStock_II
CombinationSum_ItemPicking.drawio
CountSubArrayFixBound.drawio
Determine-if-two-events-have-conflict.drawio
Determine-if-two-events-have-conflict_simple.drawio
Evaluate division.drawio
Find_all_numbers_disappeared_in_an_array
ImageOverlap.drawio
Jump Game II.drawio
Jump Game III.drawio
LICENSE
Maximum Twin Sum of a Linked List.drawio
N_Queens.drawio
New 21 game.drawio
PerfectSquare.drawio
Permutation_by_backtracking.drawio
README.md
Shortest Path in Binary Matrix.drawio
Shortest bridge.drawio
Stair climb.drawio
Subarray Sum Equals K
Subet.drawio
Subset_II_by_backtracking.drawio
Subset_by_backtracking.drawio
Swap nodes in pairs.drawio
Toeplitz Matrix.drawio
Untitled Diagram.drawio
add Reverse Linked List II.drawio
未命名绘图.drawio

No_0067_Add Binary

Jan 2, 2020

8ac0f43 · Jan 2, 2020

Name	Name	Last commit message	Last commit date
parent directory ..
No_67_Add Binary_description.md	No_67_Add Binary_description.md	Revise Folder Structure	Jan 2, 2020
add_binary_by_int_and_fstring.py	add_binary_by_int_and_fstring.py	Revise Folder Structure	Jan 2, 2020

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