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.vscode
.vscode
 
 
ML_basics
ML_basics
 
 
binarytree
binarytree
 
 
blind75
blind75
 
 
paypal
paypal
 
 
.DS_Store
.DS_Store
 
 
1. Two Sum.java
1. Two Sum.java
 
 
100. Same Tree.java
100. Same Tree.java
 
 
101. Symmetric Tree.java
101. Symmetric Tree.java
 
 
1010. Pairs of Songs With Total Durations Divisible by 60.java
1010. Pairs of Songs With Total Durations Divisible by 60.java
 
 
102. Binary Tree Level Order Traversal.java
102. Binary Tree Level Order Traversal.java
 
 
104. Maximum Depth of Binary Tree.java
104. Maximum Depth of Binary Tree.java
 
 
1045. Customers Who Bought All Products.sql
1045. Customers Who Bought All Products.sql
 
 
1070. Product Sales Analysis III.sql
1070. Product Sales Analysis III.sql
 
 
108. Convert Sorted Array to Binary Search Tree.java
108. Convert Sorted Array to Binary Search Tree.java
 
 
11. Container With Most Water.java
11. Container With Most Water.java
 
 
1119. Remove Vowels from a String.java
1119. Remove Vowels from a String.java
 
 
114. Flatten Binary Tree to Linked List.java
114. Flatten Binary Tree to Linked List.java
 
 
1174. Immediate Food Delivery II.sql
1174. Immediate Food Delivery II.sql
 
 
118. Pascal's Triangle.java
118. Pascal's Triangle.java
 
 
1193. Monthly Transactions I.sql
1193. Monthly Transactions I.sql
 
 
12. Integer to Roman.java
12. Integer to Roman.java
 
 
1207. Unique Number of Occurrences.java
1207. Unique Number of Occurrences.java
 
 
1209. Remove All Adjacent Duplicates in String II.java
1209. Remove All Adjacent Duplicates in String II.java
 
 
121. Best Time to Buy and Sell Stock.java
121. Best Time to Buy and Sell Stock.java
 
 
122. Best Time to Buy and Sell Stock II.java
122. Best Time to Buy and Sell Stock II.java
 
 
125. Valid Palindrome.java
125. Valid Palindrome.java
 
 
1265. Print Immutable Linked List in Reverse.java
1265. Print Immutable Linked List in Reverse.java
 
 
128. Longest Consecutive Sequence.java
128. Longest Consecutive Sequence.java
 
 
13. Roman to Integer.java
13. Roman to Integer.java
 
 
1328. Break a Palindrome.java
1328. Break a Palindrome.java
 
 
1356. Sort Integers by The Number of 1 Bits.java
1356. Sort Integers by The Number of 1 Bits.java
 
 
136. Single Number.java
136. Single Number.java
 
 
138. Copy List with Random Pointer.java
138. Copy List with Random Pointer.java
 
 
1404. Number of Steps to Reduce a Number in Binary Representation to One.java
1404. Number of Steps to Reduce a Number in Binary Representation to One.java
 
 
141. Linked List Cycle.java
141. Linked List Cycle.java
 
 
142. Linked List Cycle II.java
142. Linked List Cycle II.java
 
 
143. Reorder List.java
143. Reorder List.java
 
 
1431. Kids With the Greatest Number of Candies.java
1431. Kids With the Greatest Number of Candies.java
 
 
144. Binary Tree Preorder Traversal.java
144. Binary Tree Preorder Traversal.java
 
 
1445. Apples & Oranges.sql
1445. Apples & Oranges.sql
 
 
145. Binary Tree Postorder Traversal.java
145. Binary Tree Postorder Traversal.java
 
 
146. LRU Cache.java
146. LRU Cache.java
 
 
1480. Running Sum of 1d Array.java
1480. Running Sum of 1d Array.java
 
 
15. 3Sum.java
15. 3Sum.java
 
 
150. Evaluate Reverse Polish Notation.java
150. Evaluate Reverse Polish Notation.java
 
 
1502. Can Make Arithmetic Progression From Sequence.java
1502. Can Make Arithmetic Progression From Sequence.java
 
 
151. Reverse Words in a String.java
151. Reverse Words in a String.java
 
 
152. Maximum Product Subarray.java
152. Maximum Product Subarray.java
 
 
1523. Count Odd Numbers in an Interval Range.java
1523. Count Odd Numbers in an Interval Range.java
 
 
153. Find Minimum in Rotated Sorted Array.java
153. Find Minimum in Rotated Sorted Array.java
 
 
155. Min Stack.java
155. Min Stack.java
 
 
1572. Matrix Diagonal Sum.java
1572. Matrix Diagonal Sum.java
 
 
1581. Customer Who Visited but Did Not Make Any Transactions.sql
1581. Customer Who Visited but Did Not Make Any Transactions.sql
 
 
160. Intersection of Two Linked Lists.java
160. Intersection of Two Linked Lists.java
 
 
163. Missing Ranges.java
163. Missing Ranges.java
 
 
1647. Minimum Deletions to Make Character Frequencies Unique.java
1647. Minimum Deletions to Make Character Frequencies Unique.java
 
 
166. Fraction to Recurring Decimal.java
166. Fraction to Recurring Decimal.java
 
 
1661. Average Time of Process per Machine.sql
1661. Average Time of Process per Machine.sql
 
 
167. Two Sum II - Input Array Is Sorted.java
167. Two Sum II - Input Array Is Sorted.java
 
 
168. Excel Sheet Column Title.java
168. Excel Sheet Column Title.java
 
 
169. Majority Element.java
169. Majority Element.java
 
 
17. Letter Combinations of a Phone Number.java
17. Letter Combinations of a Phone Number.java
 
 
171. Excel Sheet Column Number.java
171. Excel Sheet Column Number.java
 
 
172. Factorial Trailing Zeroes.java
172. Factorial Trailing Zeroes.java
 
 
1768. Merge Strings Alternately.java
1768. Merge Strings Alternately.java
 
 
189. Rotate Array.java
189. Rotate Array.java
 
 
19. Remove Nth Node From End of List.java
19. Remove Nth Node From End of List.java
 
 
1907. Count Salary Categories.sql
1907. Count Salary Categories.sql
 
 
1920. Build Array from Permutation.java
1920. Build Array from Permutation.java
 
 
1929. Concatenation of Array.java
1929. Concatenation of Array.java
 
 
1934. Confirmation Rate.sql
1934. Confirmation Rate.sql
 
 
197. Rising Temperature.sql
197. Rising Temperature.sql
 
 
2. Add Two Numbers.java
2. Add Two Numbers.java
 
 
20. Valid Parentheses.java
20. Valid Parentheses.java
 
 
200. Number of Islands.java
200. Number of Islands.java
 
 
202. Happy Number.java
202. Happy Number.java
 
 
204. Count Primes.java
204. Count Primes.java
 
 
206. Reverse Linked List.java
206. Reverse Linked List.java
 
 
209. Minimum Size Subarray Sum.java
209. Minimum Size Subarray Sum.java
 
 
21. Merge Two Sorted Lists.java
21. Merge Two Sorted Lists.java
 
 
215. Kth Largest Element in an Array.java
215. Kth Largest Element in an Array.java
 
 
217. Contains Duplicate.java
217. Contains Duplicate.java
 
 
22. Generate Parentheses.java
22. Generate Parentheses.java
 
 
2244. Minimum Rounds to Complete All Tasks.java
2244. Minimum Rounds to Complete All Tasks.java
 
 
230. Kth Smallest Element in a BST.java
230. Kth Smallest Element in a BST.java
 
 
2300. Successful Pairs of Spells and Potions.java
2300. Successful Pairs of Spells and Potions.java
 
 
231. Power of Two.java
231. Power of Two.java
 
 
234. Palindrome Linked List.java
234. Palindrome Linked List.java
 
 
236. Lowest Common Ancestor of a Binary Tree.java
236. Lowest Common Ancestor of a Binary Tree.java
 
 
237. Delete Node in a Linked List.java
237. Delete Node in a Linked List.java
 
 
238. Product of Array Except Self.java
238. Product of Array Except Self.java
 
 
239. Sliding Window Maximum.java
239. Sliding Window Maximum.java
 
 
240. Search a 2D Matrix II.java
240. Search a 2D Matrix II.java
 
 
242. Valid Anagram.java
242. Valid Anagram.java
 
 
268. Missing Number.java
268. Missing Number.java
 
 
271. Encode and Decode Strings.java
271. Encode and Decode Strings.java
 
 
28. Find the Index of the First Occurrence in a String.java
28. Find the Index of the First Occurrence in a String.java
 
 
287. Find the Duplicate Number.java
287. Find the Duplicate Number.java
 
 
290. Word Pattern.java
290. Word Pattern.java
 
 

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my personal best leetcode solutions - Most beats 100% in terms of run time and space time complexity

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