LeetCode

LeetCode Algorithm

(Notes: "🔒" means you need to buy a book from Leetcode)

#	Title	Solution	Difficulty
<<<<<<< HEAD
1946	Largest Number After Mutating Substring	C++	Medium
=======
1946	Largest Number After Mutating Substring	C++, Java	Medium

upstream/master |1945|Sum of Digits of String After Convert | C++|Easy| |1935|Maximum Number of Words You Can Type | C++|Easy| |1884|Egg Drop With 2 Eggs and N Floors | C++|Medium| |1882|Process Tasks Using Servers | C++|Medium| |1881|Maximum Value after Insertion | C++|Medium| |1880|Check if Word Equals Summation of Two Words | C++|Easy| |1877|Minimize Maximum Pair Sum in Array | C++|Medium| |1876|Substrings of Size Three with Distinct Characters | C++|Easy| |1871|Jump Game VII | C++|Medium| |1870|Minimum Speed to Arrive on Time | C++|Medium| |1869|Longer Contiguous Segments of Ones than Zeros | C++|Easy| |1862|Sum of Floored Pairs | C++|Hard| |1861|Rotating the Box | C++|Medium| |1860|Incremental Memory Leak | C++|Medium| |1859|Sorting the Sentence | C++|Easy| |1857|Largest Color Value in a Directed Graph | C++|Hard| |1856|Maximum Subarray Min-Product | C++|Medium| |1855|Maximum Distance Between a Pair of Values | C++|Medium| |1854|Maximum Population Year | C++|Easy| |1851|Minimum Interval to Include Each Query | C++|Hard| |1850|Minimum Adjacent Swaps to Reach the Kth Smallest Number | C++|Medium| |1849|Splitting a String Into Descending Consecutive Values | C++|Medium| |1848|Minimum Distance to the Target Element | C++|Easy| |1847|Closest Room | C++|Hard| |1846|Maximum Element After Decreasing and Rearranging | C++|Medium| |1845|Seat Reservation Manager | C++|Medium| |1844|Replace All Digits with Characters | C++|Easy| |1840|Maximum Building Height | C++|Hard| |1839|Longest Substring Of All Vowels in Order | C++|Medium| |1838|Frequency of the Most Frequent Element | C++|Medium| |1837|Sum of Digits in Base K | C++|Easy| |1835|Find XOR Sum of All Pairs Bitwise AND | C++|Hard| |1834|Single-Threaded CPU | C++|Medium| |1833|Maximum Ice Cream Bars | C++|Medium| |1832|Check if the Sentence Is Pangram | C++|Easy| |1829|Maximum XOR for Each Query | C++|Medium| |1828|Queries on Number of Points Inside a Circle | C++|Medium| |1827|Minimum Operations to Make the Array Increasing | C++|Easy| |1825|Finding MK Average | C++|Hard| |1824|Minimum Sideway Jumps | C++|Medium| |1823|Find the Winner of the Circular Game | C++|Medium| |1822|Sign of the Product of an Array | C++|Easy| |1819|Number of Different Subsequences GCDs | C++|Hard| |1818|Minimum Absolute Sum Difference | C++|Medium| |1817|Finding the Users Active Minutes | C++|Medium| |1816|Truncate Sentence | C++|Easy| |1815|Maximum Number of Groups Getting Fresh Donuts | C++|Hard| |1814|Count Nice Pairs in an Array | C++|Medium| |1813|Sentence Similarity III | C++|Medium| |1812|Determine Color of a Chessboard Square | C++|Easy| |1808|Maximize Number of Nice Divisors | C++|Hard| |1807|Evaluate the Bracket Pairs of a String | C++|Medium| |1806|Minimum Number of Operations to Reinitialize a Permutation | C++|Medium| |1805|Number of Different Integers in a String | C++|Easy| |1803|Count Pairs With XOR in a Range | C++|Hard| |1802|Maximum Value at a Given Index in a Bounded Array | C++|Medium| |1801|Number of Orders in the Backlog | C++|Medium| |1800|Maximum Ascending Subarray Sum | C++|Easy| |1799|Maximize Score After N Operations | C++|Hard| |1798|Maximum Number of Consecutive Values You Can Make | C++|Medium| |1797|Design Authentication Manager | C++|Medium| |1796|Second Largest Digit in a String | C++|Easy| |1793|Maximum Score of a Good Subarray | C++|Hard| |1792|Maximum Average Pass Ratio | C++|Medium| |1791|Find Center of Star Graph | C++|Medium| |1790|Check if One String Swap Can Make Strings Equal | C++|Easy| |1787|Make the XOR of All Segments Equal to Zero | C++|Hard| |1786|Number of Restricted Paths From First to Last Node | C++|Medium| |1785|Minimum Elements to Add to Form a Given Sum | C++|Medium| |1784|Check if Binary String Has at Most One Segment of Ones | C++|Easy| |1782|Count Pairs Of Nodes | C++|Hard| |1781|Sum of Beauty of All Substrings | C++|Medium| |1780|Check if Number is a Sum of Powers of Three | C++|Medium| |1779|Find Nearest Point That Has the Same X or Y Coordinate | C++|Easy| |1775|Equal Sum Arrays With Minimum Number of Operations | C++|Medium| |1774|Closest Dessert Cost | C++|Medium| |1773|Count Items Matching a Rule | C++|Easy| |1771|Maximize Palindrome Length From Subsequences | C++|Hard| |1770|Maximum Score from Performing Multiplication Operations | C++|Medium| |1769|Minimum Number of Operations to Move All Balls to Each Box | C++|Medium| |1768|Merge Strings Alternately | C++|Easy| |1766|Tree of Coprimes | C++|Hard| |1765|Map of Highest Peak | C++|Medium| |1764|Form Array by Concatenating Subarrays of Another Array | C++|Medium| |1763|Longest Nice Substring | C++|Easy| |1761|Minimum Degree of a Connected Trio in a Graph | C++|Hard| |1760|Minimum Limit of Balls in a Bag | C++|Medium| |1759|Count Number of Homogenous Substrings | C++|Medium| |1758|Minimum Changes To Make Alternating Binary String | C++|Easy| |1755|Closest Subsequence Sum | C++|Hard| |1754|Largest Merge Of Two Strings | C++|Medium| |1753|Maximum Score From Removing Stones | C++|Medium| |1752|Check if Array Is Sorted and Rotated | C++|Easy| |1751|Maximum Number of Events That Can Be Attended II | C++|Hard| |1750|Minimum Length of String After Deleting Similar Ends | C++|Medium| |1749|Maximum Absolute Sum of Any Subarray | C++|Medium| |1748|Sum of Unique Elements | C++|Easy| |1743|Restore the Array From Adjacent Pairs | C++|Medium| |1742|Maximum Number of Balls in a Box | C++|Easy| |1739|Building Boxes | C++|Hard| |1738|Find Kth Largest XOR Coordinate Value | C++|Medium| |1736|Latest Time by Replacing Hidden Digits | C++|Easy| |1734|Decode XORed Permutation | C++|Medium| |1733|Minimum Number of People to Teach | C++|Medium| |1732|Find the Highest Altitude | C++|Easy| |1727|Largest Submatrix With Rearrangements | C++|Medium| |1726|Tuple with Same Product | C++|Medium| |1725|Number Of Rectangles That Can Form The Largest Square | C++|Easy| |1718|Construct the Lexicographically Largest Valid Sequence | C++|Medium| |1717|Maximum Score From Removing Substrings | C++|Medium| |1716|Calculate Money in Leetcode Bank | C++|Easy| |1712|Ways to Split Array Into Three Subarrays | C++|Medium| |1711|Count Good Meals | C++|Medium| |1710|Maximum Units on a Truck | C++|Easy| |1700|Number of Students Unable to Eat Lunch | C++|Easy| |1695|Maximum Erasure Value | C++|Medium| |1694|Reformat Phone Number | C++|Easy| |1625|Lexicographically Smallest String After Applying Operations | C++|Medium| |1624|Largest Substring Between Two Equal Characters | C++|Easy| |1605|Find Valid Matrix Given Row and Column Sums | C++|Medium| |1573|Number of Ways to Split a String | C++|Medium| |1556|Thousand Separator | C++|Easy| |1551|Minimum Operations to Make Array Equal | C++|Medium| |1550|Three Consecutive Odds | C++|Easy| |1541|Minimum Insertions to Balance a Parentheses String | C++|Medium| |1535|Find the Winner of an Array Game | C++|Medium| |1529|Bulb Switcher IV | C++|Medium| |1528|Shuffle String | C++|Easy| |1525|Number of Good Ways to Split a String | C++|Medium| |1524|Number of Sub-arrays With Odd Sum | C++|Medium| |1523|Count Odd Numbers in an Interval Range | C++|Easy| |1513|Number of Substrings With Only 1s | C++|Medium| |1470|Shuffle the Array | C++|Easy| |1464|Maximum Product of Two Elements in an Array | C++|Easy| |1460|Make Two Arrays Equal by Reversing Sub-arrays | C++|Easy| |1376|Time Needed to Inform All Employees | C++|Medium| |1375|Bulb Switcher III | C++|Medium| |1353|Maximum Number of Events That Can Be Attended | C++|Medium| |1333|Filter Restaurants by Vegan-Friendly, Price and Distance | C++|Medium| |1207|Unique Number of Occurrences | C++|Easy| |1170|Compare Strings by Frequency of the Smallest Character | C++|Easy| |1071|Greatest Common Divisor of Strings | C++|Easy| |1030|Matrix Cells in Distance Order | C++|Easy| |1029|Two City Scheduling | C++|Easy| |1028|Recover a Tree From Preorder Traversal | C++|Hard| |1024|Video Stitching | C++|Medium| |993|Cousins in Binary Tree | C++|Easy| |991|Broken Calculator | C++|Medium| |990|Satisfiability of Equality Equations | C++|Medium| |989|Add to Array-Form of Integer | C++|Easy| |988|Smallest String Starting From Leaf | C++|Medium| |987|Vertical Order Traversal of a Binary Tree | C++|Medium| |986|Interval List Intersections | C++|Medium| |985|Sum of Even Numbers After Queries | C++|Easy| |984|String Without AAA or BBB | C++|Easy| |983|Minimum Cost For Tickets | C++|Medium| |982|Triples with Bitwise AND Equal To Zero | C++|Hard| |981|Time Based Key-Value Store | C++|Medium| |980|Unique Paths III | C++,Python|Hard| |979|Distribute Coins in Binary Tree | C++|Medium| |978|Longest Turbulent Subarray | C++,Python|Medium| |977|Squares of a Sorted Array | C++, Python|Easy| |976|Largest Perimeter Triangle | C++, Python|Easy| |971|Flip Binary Tree To Match Preorder Traversal | Python|Medium| |969|Pancake Sorting | Python|Medium| |961|N-Repeated element in size 2N Array | C++|Easy| |958|Check Completeness of a Binary Tree | Python|Medium| |951|Flip Equivalent Binary Trees | Python|Medium| |950|Reveal Cards In Increasing Order | Python|Medium| |941|Valid Mountain Array | Python|Easy| |933|Number of Recent Calls | C++|Easy| |931|Minimum Falling Path Sum | C++|Medium| |929|Unique Email Addresses | C++|Easy| |922|Sort Array By Parity II | C++|Easy| |914|X of a Kind in a Deck of Cards | Python|Easy| |905|Sort Array By Parity | C++|Easy| |876|Middle of the Linked List | Python|Easy| |859|Buddy Strings | C++|Easy| |858|Mirror Reflection | C++|Medium| |852|Peak Index in a Mountain Array | C++|Easy| |849|Maximize Distance to Closest Person | Python|Easy| |844|Backspace String Compare | C++|Easy| |837|Most Common Word | C++|Easy| |830|Positions of Large Groups | Python|Easy| |820|Short Encoding of Words | C++|Medium| |804|Unique Morse Code Words | C++|Easy| <<<<<<< HEAD ======= |776|Swim In Rising Water | Python|Hard| upstream/master |771|Jewels and Stones | C++|Easy| |747|Largest Number At Least Twice of Others | Python|Easy| |746|Min Cost Climbing Stairs | C++, Python|Easy| |721|Accounts Merge | C++|Medium| |717|1-bit and 2-bit Characters | Python|Easy| |714|Best Time to Buy and Sell Stock with Transaction Fee | C++|Medium| |712|Minimum ASCII Delete Sum for Two Strings | C++|Medium| |695|Max Area of Island | C++|Medium| |687|Longest Univalue Path | Python|Easy| |684|Redundant Connection | Python|Medium| |674|Longest Continuous Increasing Subsequence | Python|Easy| |672|Bulb Switcher II | C++|Medium| |671|Second Minimum Node In a Binary Tree | Python|Easy| |665|Non-decreasing Array | Python|Easy| |662|Maximum Width of Binary Tree | Python|Medium| |661|Image Smoother | Python|Easy| |655|Print Binary Tree | Python|Medium| |652|Find Duplicate Subtrees | Python|Medium| |647|Palindromic Substrings | C++|Medium| |643|Maximum Average Subarray I | C++, Python|Easy| |628|Maximum Product of Three Numbers | Python|Easy| |623|Add One Row to Tree | Python|Medium| |581|Shortest Unsorted Continuous Subarray | Python|Easy| |572|Subtree of Another Tree | Python|Easy| |563|Binary Tree Tilt | Python|Easy| |547|Friend Circles | C++|Medium| |543|Diameter of Binary Tree | C++, Python|Easy| |538|Convert BST to Greater Tree | Python|Easy| |532|K-diff Pairs in an Array | Python|Easy| |520|Detect Capital | C++|Easy| |518|Coin Change 2 | C++|Medium| |516|Longest Palindromic Subsequence | C++|Medium| |509|Fibonacci Number | C++, Python|Easy| |497|Random Point in Non-overlapping Rectangles | C++|Medium| |494|Target Sum | C++|Medium| |477|Total Hamming Distance | C++|Medium| |463|Island Perimeter | C++|Easy| |450|DeleteNodeInABST | Python|Medium| |449|Serialize and Deserialize BST | Python|Medium| |438|Find all Anagrams in a string | C++|Medium| |437|Path Sum III | Python|Medium| |418|SentenceScreenFitting 🔒 | C++|Easy| |416|Partition Equal Subset Sum | C++|Medium| |415|Add Strings | C++|Easy| |414|Third Maximum Number | C++, Python|Easy| |413|Arithmetic Slices | C++|Medium| |412|Fizz Buzz | C++|Easy| |410|Split Array Largest Sum | C++|Hard| |409|Longest Palindrome | C++|Easy| |406|Queue Reconstruction by Height | C++|Medium| |405|Convert a Number to Hexadecimal | C++|Easy| |404|Sum of Left Leaves | C++, Python|Easy| |403|Frog Jump | C++|Hard| |402|Remove K Digits | C++|Medium| |401|Binary Watch | C++|Easy| |400|Nth Digit | C++|Medium| |399|Evaluate Division | C++|Medium| |398|Random Pick Index | C++|Medium| |397|Integer Replacement | C++|Medium| |396|Rotate Function | C++|Easy| |395|Longest Substring with At Least K Repeating Characters | C++|Medium| |394|Decode String | C++|Medium| |393|UTF-8 Validation | C++|Medium| |392|Is Subsequence | C++|Medium| |391|Perfect Rectangle | C++|Hard| |390|Elimination Game | C++|Medium| |389|Find the Difference | C++|Easy| |388|Longest Absolute File Path | C++|Medium| |387|First Unique Character in a String | C++|Easy| |386|Lexicographical Numbers | C++|Medium| |385|Mini Parser | C++|Medium| |384|Shuffle an Array | C++|Medium| |383|Ransom Note | C++|Easy| |382|Linked List Random Node | C++|Medium| |381|Insert Delete GetRandom O(1) - Duplicates allowed | C++|Hard| |380|Insert Delete GetRandom O(1) | C++|Hard| |377|Combination Sum IV | C++|Medium| |376|Wiggle Subsequence | C++|Medium| |371|Sum of Two Integers | C++|Easy| |367|Valid Perfect Square | C++|Easy| |357|Count Numbers with Unique Digits | C++|Medium| |350|Intersection of Two Arrays II | C++|Easy| |349|Intersection of Two Arrays | C++|Easy| |347|Top K Frequent Elements | C++|Medium| |345|Reverse Vowels of a String | C++|Easy| |344|Reverse String | C++|Easy| |343|Integer Break | C++|Medium| |342|Power of Four | C++|Easy| |341|Flatten Nested List Iterator | C++|Medium| |338|Counting Bits | C++|Medium| |337|House Robber III | C++, Python|Medium| |336|Palindrome Pairs | C++|Hard| |334|Increasing Triplet Subsequence | C++|Medium| |332|Reconstruct Itinerary | C++|Medium| |331|Verify Preorder Serialization of a Binary Tree | C++|Medium| |330|Patching Array | C++|Medium| |329|Longest Increasing Path in a Matrix | C++|Medium| |328|Odd Even Linked List | C++|Easy| |327|Count of Range Sum | C++|Hard| |326|Power of Three | C++|Easy| |324|Wiggle Sort II | C++|Medium| |322|Coin Change | C++|Medium| |321|Create Maximum Number | C++|Hard| |319|Bulb Switcher | C++|Medium| |318|Maximum Product of Word Lengths | C++|Medium| |316|Remove Duplicate Letters | C++|Hard| |315|Count of Smaller Numbers After Self | C++|Hard| |313|Super Ugly Number | C++|Medium| |312|Burst Balloons | C++|Hard| |310|Minimum Height Trees | C++|Medium| |309|Best Time to Buy and Sell Stock with Cooldown | C++|Medium| |307|Range Sum Query - Mutable | C++|Medium| |306|Additive Number | C++|Medium| |304|Range Sum Query 2D - Immutable | C++|Medium| |303|Range Sum Query - Immutable | C++|Easy| |301|Remove Invalid Parentheses | C++ |Hard| |300|Longest Increasing Subsequence | C++|Medium| |299|Bulls and Cows | C++|Easy| |297|Serialize and Deserialize Binary Tree | C++|Medium| |295|Find Median from Data Stream | C++|Hard| |292|Nim Game | C++|Easy| |290|Word Pattern | C++|Easy| |289|Game of Life | C++|Medium| |287|Find the Duplicate Number | C++, Python|Hard| |285|Inorder Successor in BST 🔒 | Java|Medium| |284|Peeking Iterator | C++|Medium| |283|Move Zeroes | C++|Easy| |282|Expression Add Operators | C++|Hard| |279|Perfect Squares | C++|Medium| |278|First Bad Version| C++, Java|Easy| |275|H-Index II| C++|Medium| |274|H-Index| C++|Medium| |273|Integer to English Words| C++|Medium| |268|Missing Number| C++|Medium| |264|Ugly Number II| C++|Medium| |263|Ugly Number| C++|Easy| |260|Single Number III| C++|Medium| |258|Add Digits| C++|Easy| |257|Binary Tree Paths| C++|Easy| |242|Valid Anagram| C++, Java|Easy| |241|Different Ways to Add Parentheses|C++, Python|Medium| |240|Search a 2D Matrix II|C++, Java, Python|Medium| |239|Sliding Window Maximum| C++|Hard| |238|Product of Array Except Self| C++|Medium| |237|Delete Node in a Linked List| C++|Easy| |236|Lowest Common Ancestor of a Binary Tree| C++, Java, Python|Medium| |235|Lowest Common Ancestor of a Binary Search Tree| C++, Python|Easy| |234|Palindrome Linked List| C++|Easy| |233|Number of Digit One| C++|Medium| |232|Implement Queue using Stacks| C++, Java|Easy| |231|Power of Two| C++|Easy| |230|Kth Smallest Element in a BST| C++, Python|Medium| |229|Majority Element II | C++|Medium| |228|Summary Ranges| C++|Easy| |227|Basic Calculator II| C++|Medium| |226|Invert Binary Tree| C++|Easy| |225|Implement Stack using Queues| C++, Java|Medium| |224|Basic Calculator| C++|Medium| |223|Rectangle Area| C++|Easy| |222|Count Complete Tree Nodes| C++, Python|Medium| |221|Maximal Square| C++|Medium| |220|Contains Duplicate III| C++, Python|Medium| |219|Contains Duplicate II| C++, Python|Easy| |218|The Skyline Problem| C++|Hard| |217|Contains Duplicate| C++|Easy| |216|Combination Sum III| C++|Medium| |215|Kth Largest Element in an Array| C++|Medium| |214|Shortest Palindrome| C++|Hard| |213|House Robber II| C++|Medium| |212|Word Search II| C++|Hard| |211|Add and Search Word - Data structure design| C++|Medium| |210|Course Schedule II| C++|Medium| |209|Minimum Size Subarray Sum| C++|Medium| |208|Implement Trie (Prefix Tree)| C++|Medium| |207|Course Schedule| C++|Medium| |206|Reverse Linked List| C++, Java|Easy| |205|Isomorphic Strings| C++|Easy| |204|Count Primes| C++|Easy| |203|Remove Linked List Elements| C++|Easy| |202|Happy Number| C++, Python|Easy| |201|Bitwise AND of Numbers Range| C++|Medium| |200|Number of Islands| C++, Python|Medium| |199|Binary Tree Right Side View| C++|Medium| |198|House Robber| C++, Python|Easy| |191|Number of 1 Bits| C++|Easy| |190|Reverse Bits| C++|Easy| |189|Rotate Array| C++, Java|Easy| |188|Best Time to Buy and Sell Stock IV| C++|Hard| |187|Repeated DNA Sequences| C++|Medium| |186|Reverse Words in a String II 🔒 | C++|Medium| |179|Largest Number | C++|Medium| |174|Dungeon Game | C++|Hard| |173|Binary Search Tree Iterator | C++, Java, Python|Medium| |172|Factorial Trailing Zeroes | C++|Easy| |171|Excel Sheet Column Number | C++|Easy| |170|Two Sum III - Data structure design 🔒 | C++|Easy| |169|Majority Element | C++|Easy| |168|Excel Sheet Column Title | C++|Easy| |167|Two Sum II - Input array is sorted 🔒 | C++|Medium| |166|Fraction to Recurring Decimal | C++|Medium| |165|Compare Version Numbers | C++|Easy| |164|Maximum Gap | C++|Hard| |163|Missing Ranges 🔒 | C++|Medium| |162|Find Peak Element | C++, Java|Medium| |161|One Edit Distance🔒 | C++|Medium| |160|Intersection of Two Linked Lists | C++|Easy| |159|Longest Substring with At Most Two Distinct Characters 🔒 | C++|Hard| |158|Read N Characters Given Read4 II - Call multiple times 🔒 | C++|Hard| |157|Read N Characters Given Read4 🔒 | C++|Easy| |156|Binary Tree Upside Down 🔒 | C++|Medium| |155|Min Stack| C++, Java|Easy| |154|Find Minimum in Rotated Sorted Array II| C++|Hard| |153|Find Minimum in Rotated Sorted Array| C++, Java|Medium| |152|Maximum Product Subarray| C++|Medium| |151|Reverse Words in a String| C++, Java|Medium| |150|Evaluate Reverse Polish Notation| C++|Medium| |149|Max Points on a Line| C++|Hard| |148|Sort List| C++, Python|Medium| |147|Insertion Sort List| C++, Python|Medium| |146|LRU Cache| C++, Java|Hard| |145|Binary Tree Postorder Traversal| C++, Python|Hard| |144|Binary Tree Preorder Traversal| C++, Java|Medium| |143|Reorder List| C++, Python|Medium| |142|Linked List Cycle II| C++, Python|Medium| |141|Linked List Cycle| C++|Medium| |140|Word Break II| C++|Hard| |139|Word Break| C++|Medium| |138|Copy List with Random Pointer| C++, Python|Hard| <<<<<<< HEAD |137|Single Number II| C++|Medium| ======= |137|Single Number II| C++, Python|Medium| upstream/master |136|Single Number| C++|Medium| |135|Candy| C++|Hard| |134|Gas Station| C++|Medium| |133|Clone Graph| C++|Medium| |132|Palindrome Partitioning II| C++|Hard| |131|Palindrome Partitioning| C++|Medium| |130|Surrounded Regions| C++|Medium| |129|Sum Root to Leaf Numbers| C++, Python|Medium| <<<<<<< HEAD |128|Longest Consecutive Sequence| C++|Hard| ======= |128|Longest Consecutive Sequence| C++, Python|Medium| upstream/master |127|Word Ladder| C++|Medium| |126|Word Ladder II| C++|Hard| |125|Valid Palindrome| C++, Java|Easy| |124|Binary Tree Maximum Path Sum| C++, Java|Hard| |123|Best Time to Buy and Sell Stock III| C++|Hard| |122|Best Time to Buy and Sell Stock II| C++|Medium| |121|Best Time to Buy and Sell Stock| C++|Medium| |120|Triangle| C++, Java|Medium| |119|Pascal's Triangle II| C++|Easy| |118|Pascal's Triangle| C++|Easy| |117|Populating Next Right Pointers in Each Node II| C++, Python|Hard| |116|Populating Next Right Pointers in Each Node| C++, Python|Medium| |115|Distinct Subsequences| C++|Hard| |114|Flatten Binary Tree to Linked List| C++, Python|Medium| |113|Path Sum II| C++, Python|Medium| |112|Path Sum| C++|Easy| |111|Minimum Depth of Binary Tree| C++|Easy| |110|Balanced Binary Tree| C++, Java|Easy| |109|Convert Sorted List to Binary Search Tree| C++|Medium| |108|Convert Sorted Array to Binary Search Tree| C++|Medium| |107|Binary Tree Level Order Traversal II| C++|Easy| |106|Construct Binary Tree from Inorder and Postorder Traversal| C++, Python|Medium| |105|Construct Binary Tree from Preorder and Inorder Traversal| C++, Python|Medium| |104|Maximum Depth of Binary Tree| C++, Java|Easy| |103|Binary Tree Zigzag Level Order Traversal| C++, Python|Medium| |102|Binary Tree Level Order Traversal| C++, Java|Easy| |101|Symmetric Tree| C++|Easy| |100|Same Tree| C++|Easy| |99|Recover Binary Search Tree| C++|Hard| |98|Validate Binary Search Tree| C++, Java, Python|Medium| |97|Interleaving String| C++|Hard| |96|Unique Binary Search Trees| C++, Python|Medium| |95|Unique Binary Search Trees II| C++, Python|Medium| |94|Binary Tree Inorder Traversal| C++|Medium| |93|Restore IP Addresses| C++|Medium| |92|Reverse Linked List II| C++, Java, Python|Medium| |91|Decode Ways| C++|Medium| |90|Subsets II| C++, Java|Medium| |89|Gray Code| C++|Medium| |88|Merge Sorted Array| C++|Easy| |87|Scramble String| C++|Hard| |86|Partition List| C++, Python|Medium| |85|Maximal Rectangle| C++|Hard| |84|Largest Rectangle in Histogram| C++|Hard| |83|Remove Duplicates from Sorted List| C++|Easy| |82|Remove Duplicates from Sorted List II| C++, Python|Medium| |81|Search in Rotated Sorted Array II| C++|Medium| |80|Remove Duplicates from Sorted Array II| C++|Medium| |79|Word Search| C++|Medium| |78|Subsets| C++, Java, Python|Medium| |77|Combinations| C++|Medium| |76|Minimum Window Substring| C++|Hard| |75|Sort Colors| C++|Medium| |74|Search a 2D Matrix| C++, Java|Medium| |73|Set Matrix Zeroes| C++|Medium| |72|Edit Distance| C++|Hard| |71|Simplify Path| C++|Medium| |70|Climbing Stairs| C++, Java|Easy| |69|Sqrt(x)| C++|Medium| |68|Text Justification| C++|Hard| |67|Add Binary| C++|Easy| |66|Plus One| C++|Easy| |65|Valid Number| C++|Easy| |64|Minimum Path Sum| C++, Java|Medium| |63|Unique Paths II| C++, Java|Medium| |62|Unique Paths| C++, Java|Medium| |61|Rotate List| C++|Medium| |60|Permutation Sequence| C++|Medium| |59|Spiral Matrix II| C++|Medium| |58|Length of Last Word| C++, Java|Easy| |57|Insert Interval| C++|Hard| |56|Merge Intervals| C++|Hard| |55|Jump Game| C++, Python|Medium| |54|Spiral Matrix| C++|Medium| |53|Maximum Subarray| C++, Java|Medium| |52|N-Queens II| C++|Hard| |51|N-Queens| C++|Hard| |50|"Pow(x, n)"| C++, Java|Medium| |49|Group Anagrams| C++|Medium| <<<<<<< HEAD |48|Rotate Image| C++|Medium| ======= |48|Rotate Image| C++, Java|Medium| upstream/master |47|Permutations II| C++|Hard| |46|Permutations| C++|Medium| |45|Jump Game II| C++|Hard| |44|Wildcard Matching| C++|Hard| |43|Multiply Strings| C++|Medium| |42|Trapping Rain Water| C++|Hard| |41|First Missing Positive| C++, Python|Hard| |40|Combination Sum II| C++|Medium| |39|Combination Sum| C++|Medium| |38|Count and Say| C++, Java|Easy| |37|Sudoku Solver| C++|Hard| |36|Valid Sudoku| C++|Easy| |35|Search Insert Position| C++, Java|Medium| |34|Search for a Range| C++, Java|Medium| |33|Search in Rotated Sorted Array| C++, Java|Hard| |32|Longest Valid Parentheses| C++|Hard| |31|Next Permutation| C++|Medium| |30|Substring with Concatenation of All Words| C++|Hard| |29|Divide Two Integers| C++|Medium| |28|Implement strStr()| C++, Java|Easy| |27|Remove Element| C++|Easy| |26|Remove Duplicates from Sorted Array| C++, Java|Easy| |25|Reverse Nodes in k-Group| C++|Hard| |24|Swap Nodes in Pairs| C++|Medium| |23|Merge k Sorted Lists| C++|Hard| |22|Generate Parentheses| C++|Medium| |21|Merge Two Sorted Lists| C++|Easy| |20|Valid Parentheses| C++|Easy| |19|Remove Nth Node From End of List| C++, Python|Easy| |18|4Sum| C++|Medium| |17|Letter Combinations of a Phone Number| C++|Medium| |16|3Sum Closest| C++|Medium| |15|3Sum| C++|Medium| |14|Longest Common Prefix| C++|Easy| |13|Roman to Integer| C++|Easy| |12|Integer to Roman| C++|Medium| |11|Container With Most Water| C++, Java|Medium| |10|Regular Expression Matching| C++|Hard| |9|Palindrome Number| C++, Java|Easy| |8|String to Integer (atoi)| C++|Easy| |7|Reverse Integer| C++|Easy| |6|ZigZag Conversion| C++|Easy| |5|Longest Palindromic Substring| C++|Medium| |4|Median of Two Sorted Arrays| C++|Hard| |3|Longest Substring Without Repeating Characters| C++|Medium| |2|Add Two Numbers| C++|Medium| |1|Two Sum| C++, Go|Easy|

<<<<<<< HEAD l

upstream/master

LeetCode Shell

#	Title	Solution	Difficulty
4	Tenth Line	Bash	Easy
3	Transpose File	Bash	Medium
2	Valid Phone Numbers	Bash	Easy
1	Word Frequency	Bash	Medium

LintCode

#	Title	Solution	Difficulty
1	Search in a big sorted array	Java	Medium
2	Search Range in Binary Search Tree	Java	Medium