Glossary

question	my answers	tags
🟢 1-Two Sum	go
🟡 2-Add Two Numbers	python
🟡 3-Longest Substring Without Repeating Characters	python, php
🟡 6-Zigzag Conversion	java (hash map), java (math)
🟡 11-Container With Most Water	go (binary search), go (two pointer)
🟡 15-3Sum	go
🟡 19-Remove Nth Node From End of List	python (two traverse)
🟢 20-Valid Parentheses	javascript
🟢 21-Merge Two Sorted Lists	python, go
🟡 22-Generate Parentheses	go
🔴 23-Merge k Sorted Lists	javascript
🟡 24-Swap Nodes in Pairs	go
🟢 26-Remove Duplicates from Sorted Array	go, java
🟢 27-Remove Element	go, java
🟢 28-Find the Index of the First Occurrence in a String	java
🟡 33-Search in Rotated Sorted Array	python
🟡 34-Find First and Last Position of Element in Sorted Array	php
🟢 35-Search Insert Position	javascript
🟡 36-Valid Sudoku	go (concurrency)
🟡 45-Jump Game II	java
🟡 48-Rotate Image	python
🟡 49-Group Anagrams	python
🟢 53-Maximum Subarray	python
🟡 55-Jump Game	python (BFS), python (DP), java (pointer)
🟡 59-Spiral Matrix II	go
🟡 63-Unique Paths II	php
🟡 64-Minimum Path Sum	python
🟢 67-Add Binary	javascript (bitwise), javascript (numeric)
🔴 68-Text Justification	java
🟡 71-Simplify Path	javascript
🔴 72-Edit Distance	python (top-down DP), python (bottom-up DP)
🟡 73-Set Matrix Zeroes	python
🟡 80-Remove Duplicates from Sorted Array II	go, java
🔴 84-Largest Rectangle in Histogram	go
🔴 87-Scramble String	python
🟢 88-Merge Sorted Array	go, java
🟡 93-Restore IP Addresses	python
🟢 94-Binary Tree Inorder Traversal	python
🟡 98-Validate Binary Search Tree	javascript
🟢 100-Same Tree	python
🟢 104-Maximum Depth of Binary Tree	javascript (DFS), go (recursive)
🟡 101-Symmetric Tree	go
🟡 102-Binary Tree Level Order Traversal	python
🟡 105-Construct Binary Tree from Preorder and Inorder Traversal	go
🟡 106-Construct Binary Tree from Inorder and Postorder Traversal	javascript
🟢 108-Convert Sorted Array to Binary Search Tree	python
🟡 109-Convert Sorted List to Binary Search Tree	javascript
🟢 112-Path Sum	python
🟢 121-Best Time to Buy and Sell Stock	python, go
🟢 125-Valid Palindrome	php
🟡 122-Best Time to Buy and Sell Stock II	python, go
🟡 128-Longest Consecutive Sequence	go
🟡 129-Sum Root to Leaf Numbers	php
🟡 133-Clone Graph	python
🟡 134-Gas Station	python
🔴 135-Candy	java
🟢 144-Binary Tree Preorder Traversal	python
🟢 145-Binary Tree Postorder Traversal	go
🟡 146-LRU Cache	go (heap), go (linked-list)	DS
🔴 149-Max Points on a Line	python
🟡 150-Evaluate Reverse Polish Notation	go
🟡 151-Reverse Words in a String	go
🟡 155-Min Stack	php (array), go (stack)	DS
🟡 167-Two Sum II - Input Array Is Sorted	go
🟢 169-Majority Element	go (hashmap), java (streaming algorithm)
🟡 172-Factorial Trailing Zeroes	python
🟡 184-Department Highest Salary	sql
🟡 189-Rotate Array	javascript, java
🟢 191-Number of 1 Bits	go
🟢 195-Tenth Line	bash
🟡 198-House Robber	go
🟡 199-Binary Tree Right Side View	python
🟡 200-Number of Islands	python
🟢 202-Happy Number	php
🟢 203-Remove Linked List Elements	php
🟢 206-Reverse a Linked List	python, go
🟡 208-Implement Trie (Prefix Tree)	python	DS
🟡 211-Design Add and Search Words Data Structure	go (hashmap), go (trie)
🟡 215-Kth Largest Element in an Array	go
🟢 217-Contains Duplicate	php (hash map)
🟢 222-Count Complete Tree Nodes	python
🟢 226-Invert Binary Tree	python (recursion), python (traverse)
🟢 228-Summary Ranges	go
🟢 232-Implement Queue using Stacks	python
🟢 235-Lowest Common Ancestor of BST	python
🟡 237-Delete Node in a Linked List	python, java
🟡 238-Product of Array Except Self	go
🟢 242-Valid Anagram	python
🟡 271-Encode and Decode Strings	python
🟡 274-H-Index	go
🟢 278-First Bad Version	php
🟢 283-Move Zeroes	go (bubble sort like) , go (2 pointer)
🟡 328-Odd Even Linked List	go
🟢 345-Reverse Vowels of a String	go
🟡 347-Top K Frequent Elements	go
🟢 349-Intersection of Two Arrays	go
🟢 383-Ransom Note	go
🟢 392-Is Subsequence	python
🟡 399-Evaluate Division	go
🟡 402-Remove K Digits	go
🟡 427-Construct Quad Tree	python	DS
🟡 443-String Compression	go
🟢 463-Island Perimeter	java
🟢 496-Next Greater Element I	go
🟡 503-Next Greater Element II	go
🟢 506-Relative Ranks	java
🟢 509-Fibonacci Number	php
🟢 530-Minimum Absolute Difference in BST	go
🟡 540-Single Element in a Sorted Array	php
🟡 547-Number of Provinces	go
🟡 554-Brick Wall	php
🟢 595-Big Countries	pandas
🟢 605-Can Place Flowers	go
🟢 606-Construct String from Binary Tree	go
🟡 623-Add One Row to Tree	java
🟢 643-Maximum Average Subarray I	go
🟡 649-Dota2 Senate	go
🟡 662-Maximum Width of Binary Tree	java
🟢 680-Valid Palindrome II	python
🟢 696-Count Binary Substrings	php
🟢 703-Kth Largest Element in a Stream	go (sorted array)
🟢 704-Binary Search	go
🟢 705-Design HashSet	go	DS
🟢 706-Design HashMap	python (array)	DS
🟡 714-Best Time to Buy and Sell Stock with Transaction Fee	go
🟢 724-Find Pivot Index	go
🟢 733-Flood Fill	python
🟡 735-Asteroid Collision	go
🟡 739-Daily Temperatures	go
🟢 744-Find Smallest Letter Greater Than Target	go
🟢 746-Min Cost Climbing Stairs	python
🟡 785-Is Graph Bipartite?	go
🟡 791-Custom Sort String	go
🟡 792-Number of Matching Subsequences	python
🟢 796-Rotate String	go
🟢 844-Backspace String Compare	python
🟡 853-Car Fleet	go
🟢 867-Transpose Matrix	go
🟢 872-Leaf-Similar Trees	go
🟢 876-Middle of the Linked List	go
🟢 933-Number of Recent Calls	go
🟡 935-Knight Dialer	go
🟡 946-Validate Stack Sequences	javascript
🟡 970-Powerful Integers	php
🟡 983-Minimum Cost For Tickets	python (dp), python (cache)
🟡 988-Smallest String Starting From Leaf	java
🟢 989-Add to Array-Form of Integer	javascript
🟡 994-Rotting Oranges	php
🟢 997-Find the Town Judge	php
🟢 1005-Maximize Sum Of Array After K Negations	go
🟡 1020-Number of Enclaves	python
🟡 1027-Longest Arithmetic Subsequence	go
🟢 1071-Greatest Common Divisor of Strings	go
🟡 1091-Shortest Path in Binary Matrix	go
🟢 1114-Print in Order	python
🟢 1137-N-th Tribonacci Number	python
🟡 1146-Snapshot Array	go	DS
🟢 1160-Find Words That Can Be Formed by Characters	go
🟡 1161-Maximum Level Sum of a Binary Tree	go
🟢 1207-Unique Number of Occurrences	go
🟢 1232-Check If It Is a Straight Line	go
🟡 1254-Number of Closed Islands	python
🟢 1266-Minimum Time Visiting All Points	go
🟡 1318-Minimum Flips to Make a OR b Equal to c	go
🟡 1319-Number of Operations to Make Network Connected	python
🟡 1325-Delete Leaves With a Given Value	java
🟡 1339-Maximum Product of Splitted Binary Tree	python
🟢 1351-Count Negative Numbers in a Sorted Matrix	php
🟡 1372-Longest ZigZag Path in a Binary Tree	python
🟡 1376-Time Needed to Inform All Employees	go
🟡 1396-Design Underground System	go
🔴 1402-Reducing Dishes	python
🟢 1422-Maximum Score After Splitting a String	go
🟡 1424-Diagonal Traverse II	go
🟢 1431-Kids With the Greatest Number of Candies	go
🟢 1436-Destination City	go
🟡 1443-Minimum Time to Collect All Apples in a Tree	python
🔴 1444-Number of Ways of Cutting a Pizza	python
🟡 1448-Count Good Nodes in Binary Tree	go
🟡 1456-Maximum Number of Vowels in a Substring of Given Length	python
🟢 1464-Maximum Product of Two Elements in an Array	go
🟡 1466-Reorder Routes to Make All Paths Lead to the City Zero	python
🟢 1475-Final Prices With a Special Discount in a Shop	python
🟢 1480-Running Sum of 1d Array	php
🟢 1491-Average Salary Excluding the Minimum and Maximum Salary	go
🟡 1493-Longest Subarray of 1’s After Deleting One Element	go
🟢 1496-Path Crossing	go
🟢 1502-Can Make Arithmetic Progression From Sequence	go
🟢 1523-Count Odd Numbers in an Interval Range	javascript
🟢 1539-Kth Missing Positive Number	javascript
🟡 1557-Minimum Number of Vertices to Reach All Nodes	go
🟡 1561-Maximum Number of Coins You Can Get	go
🔴 1569-Number of Ways to Reorder Array to Get Same BST	go
🟢 1572-Matrix Diagonal Sum	go
🟢 1603-Design Parking System	go
🟡 1630-Arithmetic Subarrays	go
🟡 1637. Widest Vertical Area Between Two Points Containing No Points	go
🔴 1639-Number of Ways to Form a Target String Given a Dictionary	python
🟡 1657-Determine if Two Strings Are Close	go
🟡 1679-Max Number of K-Sum Pairs	go
🟡 1685-Sum of Absolute Differences in a Sorted Array	go
🟢 1688-Count of Matches in Tournament	go
🟡 1721-Swapping Nodes in a Linked List	go
🟢 1732-Find the Highest Altitude	go
🔴 1739-Building Boxes	python
🟢 1757-Recyclable and Low Fat Products	pandas
🟢 1768-Merge Strings Alternately	go
🟡 1802-Maximum Value at a Given Index in a Bounded Array	go
🟡 1814-Count Nice Pairs in an Array	go
🟡 1887-Reduction Operations to Make the Array Elements Equal	go
🟢 1903-Largest Odd Number in String	go
🟢 1971-Find if Path Exists in Graph	python
🟡 2058-Find the Minimum and Maximum Number of Nodes Between Critical Points	go
🟡 2090-K Radius Subarray Averages	go	interview
🟡 2095-Delete the Middle Node of a Linked List	go
🟡 2101-Detonate the Maximum Bombs	go (normal), go (concurrency)
🟡 2130-Maximum Twin Sum of a Linked List	go (duplicate linked list), typescript (stack)
🔴 2147-Number of Ways to Divide a Long Corridor	go
🟡 2181-Merge Nodes in Between Zeros	go
🟢 2215-Find the Difference of Two Arrays	go
🔴 2218-Maximum Value of K Coins From Piles	python
🟢 2264-Largest 3-Same-Digit Number in String	go
🟡 2300-Successful Pairs of Spells and Potions	python
🟡 2316-Count Unreachable Pairs of Nodes in an Undirected Graph	python
🔴 2328-Number of Increasing Paths in a Grid	go
🟢 2331-Evaluate Boolean Binary Tree	java
🟡 2352-Equal Row and Column Pairs	go
🟡 2353-Design a Food Rating System	go (heap)	DS
🟡 2390-Removing Stars From a String	javascript
🟡 2391-Minimum Amount of Time to Collect Garbage	go
🟡 2405-Optimal Partition of String	python
🟡 2439-Minimize Maximum of Array	python
🔴 2448-Minimum Cost to Make Array Equal	go
🟡 2482-Difference Between Ones and Zeros in Row and Column	go
🟡 2487-Remove Nodes From Linked List	java
🟢 2535-Difference Between Element Sum and Digit Sum of an Array	python
🟡 2536-Increment Submatrices by One	python
🟢 2540-Minimum Common Value	go
🟢 2544-Alternating Digit Sum	python
🟡 2545-Sort the Students by Their Kth Score	python
🟡 2546-Apply Bitwise Operations to Make Strings Equal	python
🟢 2566-Maximum Difference by Remapping a Digit	python
🟡 2567-Minimum Score by Changing Two Elements	python
🟡 2568-Minimum Impossible OR	python
🟢 2582-Pass the Pillow	python
🟡 2583-Kth Largest Sum in a Binary Tree	python
🟢 2605-Form Smallest Number From Two Digit Arrays	python
🟡 2606-Find the Substring With Maximum Cost	python
🟢 2614-Prime In Diagonal	python
🟡 2615-Sum of Distances	python
🟢 2619-Array Prototype Last	javascript
🟢 2620-Counter	javascript
🟢 2621-Sleep	javascript
🟡 2622-Cache With Time Limit	javascript
🟡 2623-Memoize	javascript
🟢 2626-Array Reduce Transformation	javascript
🟢 2629-Function Composition	javascript
🟢 2634-Filter Elements from Array	javascript
🟢 2635-Apply Transform Over Each Element in Array	javascript
🟡 2637-Promise Time Limit	javascript
🔴 2642-Design Graph With Shortest Path Calculator	go
🟢 2651-Calculate Delayed Arrival Time	python
🟢 2652-Sum Multiples	python
🟡 2653-Sliding Subarray Beauty	python	DS
🟢 2665.Counter II	javascript
🟢 2666-Allow One Function Call	javascript
🟢 2667-Create Hello World Function	javascript
🟢 2696-Minimum String Length After Removing Substrings	python
🟢 2697-Lexicographically Smallest Palindrome	python
🟡 2698-Find the Punishment Number of an Integer	python
🟢 2703-Return Length of Arguments Passed	javascript
🟢 2704-To Be Or Not To Be	javascript
🟢 2715. Timeout Cancellation	javascript
🟢 2716-Minimize String Length	python
🟢 2717-Semi-Ordered Permutation	go
🟡 2718-Sum of Matrix After Queries	go
🟢 2723-Add Two Promises	javascript
🟢 2725-Interval Cancellation	javascript
🟢 2733-Neither Minimum nor Maximum	go
🟡 2734-Lexicographically Smallest String After Substring Operation	python
🟡 2735-Collecting Chocolates	python
🟢 2748-Number of Beautiful Pairs	go
🟡 2749-Minimum Operations to Make the Integer Zero	go
🟡 2750-Ways to Split Array Into Good Subarrays	go
🟢 2765-Longest Alternating Subarray	go
🟢 2769-Find the Maximum Achievable Number	go
🟡 2770-Maximum Number of Jumps to Reach the Last Index	go
🟢 2784-Check if Array is Good	go
🟡 2816-Double a Number Represented as a Linked List	java
🟡 2870-Minimum Number of Operations to Make Array Empty	javascript
🟢 3005-Count Elements With Maximum Frequency	go
🟢 3131-Find the Integer Added to Array I	java
🟢 3136-Valid Word	java
🟡 3137-Minimum Number of Operations to Make Word K-Periodic	java
🟡 3138-Minimum Length of Anagram Concatenation	java
🟢 3146-Permutation Difference between Two Strings	java
🟡 3147-Taking Maximum Energy From the Mystic Dungeon	java
🟡 3148-Maximum Difference Score in a Grid	java
🟢 3151-Special Array I	java
🟡 3152-Special Array II	java
🟡 3153-Sum of Digit Differences of All Pairs	java
🟢 3162-Find the Number of Good Pairs I	java
🟡 3163-String Compression III	java
🟢 3560-Find Minimum Log Transportation Cost	go
🟡 3561-Resulting String After Adjacent Removals	go
🟡 3566-Partition Array into Two Equal Product Subsets	go
🟡 3567-Minimum Absolute Difference in Sliding Submatrix	go
🟡 3577-Count the Number of Computer Unlocking Permutations	go
🟡 3597-Partition String	go
🟡 3598-Longest Common Prefix Between Adjacent Strings After Removals	go