Name		Name	Last commit message	Last commit date
Latest commit History 40 Commits
1 Two Sum		1 Two Sum
10 Regular Expression Matching		10 Regular Expression Matching
100 Same Tree		100 Same Tree
1004 Max Consecutive Ones III		1004 Max Consecutive Ones III
101 Symmetric Tree		101 Symmetric Tree
102 Binary Tree Level Order Traversal		102 Binary Tree Level Order Traversal
103 Binary Tree Zigzag Level Order Traversal		103 Binary Tree Zigzag Level Order Traversal
104 Maximum Depth of Binary Tree		104 Maximum Depth of Binary Tree
1047 Remove All Adjacent Duplicates In String		1047 Remove All Adjacent Duplicates In String
105 Construct Binary Tree from Preorder and Inorder Traversal		105 Construct Binary Tree from Preorder and Inorder Traversal
106 Construct Binary Tree from Inorder and Postorder Traversal		106 Construct Binary Tree from Inorder and Postorder Traversal
107 Binary Tree Level Order Traversal II		107 Binary Tree Level Order Traversal II
11 Container With Most Water		11 Container With Most Water
1192 Critical Connections in a Network		1192 Critical Connections in a Network
121 Best Time to Buy and Sell Stock		121 Best Time to Buy and Sell Stock
122 Best Time to Buy and Sell Stock II		122 Best Time to Buy and Sell Stock II
123 Best Time to Buy and Sell Stock III		123 Best Time to Buy and Sell Stock III
1338 Reduce Array Size to The Half		1338 Reduce Array Size to The Half
149 Max Points on a Line		149 Max Points on a Line
15 3Sum		15 3Sum
16 3Sum Closest		16 3Sum Closest
1658 Minimum Operations to Reduce X to Zero		1658 Minimum Operations to Reduce X to Zero
1695 Maximum Erasure Value		1695 Maximum Erasure Value
1721 Swapping Nodes in a Linked List		1721 Swapping Nodes in a Linked List
1787 Make the XOR of All Segments Equal to Zero		1787 Make the XOR of All Segments Equal to Zero
18 4Sum		18 4Sum
1824 Minimum Sideway Jumps		1824 Minimum Sideway Jumps
1856 Maximum Subarray Min-Product		1856 Maximum Subarray Min-Product
1857 Largest Color Value in a Directed Graph		1857 Largest Color Value in a Directed Graph
1866 Number of Ways to Rearrange Sticks With K Sticks Visible		1866 Number of Ways to Rearrange Sticks With K Sticks Visible
1872 Stone Game VIII		1872 Stone Game VIII
19 Remove Nth Node From End of List		19 Remove Nth Node From End of List
199 Binary Tree Right Side View		199 Binary Tree Right Side View
2 Add Two Numbers		2 Add Two Numbers
20 Valid Parentheses		20 Valid Parentheses
207 Course Schedule		207 Course Schedule
209 Minimum Size Subarray Sum		209 Minimum Size Subarray Sum
210 Course Schedule II		210 Course Schedule II
22 Generate Parentheses		22 Generate Parentheses
224 Basic Calculator		224 Basic Calculator
227 Basic Calculator II		227 Basic Calculator II
23 Merge k Sorted Lists		23 Merge k Sorted Lists
24 Swap Nodes in Pairs		24 Swap Nodes in Pairs
25 Reverse Nodes in k-Group		25 Reverse Nodes in k-Group
29 Divide Two Integers		29 Divide Two Integers
3 Longest Substring Without Repeating Characters		3 Longest Substring Without Repeating Characters
30 Substring with Concatenation of All Words		30 Substring with Concatenation of All Words
310 Minimum Height Trees		310 Minimum Height Trees
316 Remove Duplicate Letters		316 Remove Duplicate Letters
32 Longest Valid Parentheses		32 Longest Valid Parentheses
322 Coin Change		322 Coin Change
33 Search in Rotated Sorted Array		33 Search in Rotated Sorted Array
332 Reconstruct Itinerary		332 Reconstruct Itinerary
34 Find First and Last Position of Element in Sorted Array		34 Find First and Last Position of Element in Sorted Array
343 Integer Break		343 Integer Break
36 Valid Sudoku		36 Valid Sudoku
37 Sudoku Solver		37 Sudoku Solver
38 Count and Say		38 Count and Say
39 Combination Sum		39 Combination Sum
394 Decode String		394 Decode String
399 Evaluate Division		399 Evaluate Division
4 Median of Two Sorted Arrays		4 Median of Two Sorted Arrays
40 Combination Sum II		40 Combination Sum II
41 First Missing Positive		41 First Missing Positive
42 Trapping Rain Water		42 Trapping Rain Water
43 Multiply Strings		43 Multiply Strings
44 Wildcard Matching		44 Wildcard Matching
45 Jump Game II		45 Jump Game II
46 Permutations		46 Permutations
47 Permutations II		47 Permutations II
48 Rotate Image		48 Rotate Image
49 Group Anagrams		49 Group Anagrams
496 Next Greater Element I		496 Next Greater Element I
5 Longest Palindromic Substring		5 Longest Palindromic Substring
50 Pow(x, n)		50 Pow(x, n)
503 Next Greater Element II		503 Next Greater Element II
51 N-Queens		51 N-Queens
518 Coin Change 2		518 Coin Change 2
52 N-Queens II		52 N-Queens II
53 Maximum Subarray		53 Maximum Subarray
54 Spiral Matrix		54 Spiral Matrix
55 Jump Game		55 Jump Game
56 Merge Intervals		56 Merge Intervals
567 Permutation in String		567 Permutation in String
57 Insert Interval		57 Insert Interval
583 Delete Operation for Two Strings		583 Delete Operation for Two Strings
59 Spiral Matrix II		59 Spiral Matrix II
6 ZigZag Conversion		6 ZigZag Conversion
60 Permutation Sequence		60 Permutation Sequence
61 Rotate List		61 Rotate List
62 Unique Paths		62 Unique Paths
63 Unique Paths II		63 Unique Paths II
632 Smallest Range Covering Elements from K Lists		632 Smallest Range Covering Elements from K Lists
64 Minimum Path Sum		64 Minimum Path Sum
65 Valid Number		65 Valid Number
68 Text Justification		68 Text Justification
684 Redundant Connection		684 Redundant Connection
685 Redundant Connection II		685 Redundant Connection II
71 Simplify Path		71 Simplify Path
718 Maximum Length of Repeated Subarray		718 Maximum Length of Repeated Subarray

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Leetcode

This repository contains the solutions to the problems I worked on during my Google interview preparation.

I completed the first 155 problems in a row, and then I went more by topics, searching for the most upvoted problems on various categories.

If you have suggestions or you find some bug/error, please feel free to contact me or to make a pull request.

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