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( unoptimized ) 139. Word Break ( Leetcode ) ( Backtracking )
( unoptimized ) 139. Word Break ( Leetcode ) ( Backtracking )
 
 
0-1 Knapsack ( recursive solution ) (GFGs)
0-1 Knapsack ( recursive solution ) (GFGs)
 
 
1. Two Sum (Leetcode)
1. Two Sum (Leetcode)
 
 
100. Same Tree (Leetcode)
100. Same Tree (Leetcode)
 
 
1004. Max Consecutive Ones III (leetcode)
1004. Max Consecutive Ones III (leetcode)
 
 
102. Binary Tree Level Order Traversal (Leetcode)
102. Binary Tree Level Order Traversal (Leetcode)
 
 
103. Binary Tree Zigzag Level Order Traversal (Leetcode)
103. Binary Tree Zigzag Level Order Traversal (Leetcode)
 
 
11. Container With Most Water (Leetcode)
11. Container With Most Water (Leetcode)
 
 
112. Path Sum (Leetcode) (optimized)
112. Path Sum (Leetcode) (optimized)
 
 
114. Flatten Binary Tree to Linked List ( Leetcode ) (Morris Traversal + non optimal)
114. Flatten Binary Tree to Linked List ( Leetcode ) (Morris Traversal + non optimal)
 
 
1143. Longest Common Subsequence ( Leetcode )
1143. Longest Common Subsequence ( Leetcode )
 
 
116. Populating Next Right Pointers in Each Node (Leetcode)
116. Populating Next Right Pointers in Each Node (Leetcode)
 
 
118. Pascal's Triangle (Leetcode)
118. Pascal's Triangle (Leetcode)
 
 
118. Pascal's Triangle (Leetcode) (JAVA)
118. Pascal's Triangle (Leetcode) (JAVA)
 
 
119. Pascal's Triangle II (Leetcode) (JAVA)
119. Pascal's Triangle II (Leetcode) (JAVA)
 
 
121. Best Time to Buy and Sell Stock (Leetcode)
121. Best Time to Buy and Sell Stock (Leetcode)
 
 
122. Best Time to Buy and Sell Stock II (Leetcode)
122. Best Time to Buy and Sell Stock II (Leetcode)
 
 
124. Binary Tree Maximum Path Sum (Leetcode)
124. Binary Tree Maximum Path Sum (Leetcode)
 
 
128. Longest Consecutive Sequence ( leetcode )
128. Longest Consecutive Sequence ( leetcode )
 
 
129. Sum Root to Leaf Numbers (Leetcode)
129. Sum Root to Leaf Numbers (Leetcode)
 
 
131. Palindrome Partitioning (Leetcode)
131. Palindrome Partitioning (Leetcode)
 
 
134. Gas Station (Leetcode) (optimized + unoptimized)
134. Gas Station (Leetcode) (optimized + unoptimized)
 
 
1372. Longest ZigZag Path in a Binary Tree (ILeetcode)
1372. Longest ZigZag Path in a Binary Tree (ILeetcode)
 
 
1372. Longest ZigZag Path in a Binary Tree (Leetcode)
1372. Longest ZigZag Path in a Binary Tree (Leetcode)
 
 
138. Copy List with Random Pointer
138. Copy List with Random Pointer
 
 
139. Word Break ( Leetcode ) ( Dynamic programming )
139. Word Break ( Leetcode ) ( Dynamic programming )
 
 
14. Longest Common Prefix (Leetcode)
14. Longest Common Prefix (Leetcode)
 
 
141. Linked List Cycle (leetcode)
141. Linked List Cycle (leetcode)
 
 
142. Linked List Cycle II (Leetcode)
142. Linked List Cycle II (Leetcode)
 
 
1431. Kids With the Greatest Number of Candies
1431. Kids With the Greatest Number of Candies
 
 
1448. Count Good Nodes in Binary Tree (Leetcode)
1448. Count Good Nodes in Binary Tree (Leetcode)
 
 
146. LRU Cache ( Leetcode )
146. LRU Cache ( Leetcode )
 
 
148. Sort Linklist ( Merge Sort )
148. Sort Linklist ( Merge Sort )
 
 
1493. Longest Subarray of 1's After Deleting One Element (Leetcode)
1493. Longest Subarray of 1's After Deleting One Element (Leetcode)
 
 
15. 3Sum ( Leetcode )
15. 3Sum ( Leetcode )
 
 
162. Find Peak Element (Leetcode)
162. Find Peak Element (Leetcode)
 
 
1657. Determine if Two Strings Are Close (Leetcode) (unoptimized)
1657. Determine if Two Strings Are Close (Leetcode) (unoptimized)
 
 
167. Two Sum II - Input Array Is Sorted (Leetcode)
167. Two Sum II - Input Array Is Sorted (Leetcode)
 
 
1679. Max Number of K-Sum Pairs (Leetcode)
1679. Max Number of K-Sum Pairs (Leetcode)
 
 
17. Letter Combinations of a Phone Number ( leetcode )
17. Letter Combinations of a Phone Number ( leetcode )
 
 
1768. Merge Strings Alternately (Leetcode)
1768. Merge Strings Alternately (Leetcode)
 
 
1971. Find if Path Exists in Graph
1971. Find if Path Exists in Graph
 
 
200 . Number of Islands ( leetcode )
200 . Number of Islands ( leetcode )
 
 
204. Count Primes
204. Count Primes
 
 
208. Implement Trie (Prefix Tree) (Leetcode) (JAVA)
208. Implement Trie (Prefix Tree) (Leetcode) (JAVA)
 
 
2095. Delete the Middle Node of a Linked List (Leetcode) (JAVA)
2095. Delete the Middle Node of a Linked List (Leetcode) (JAVA)
 
 
217. Contains Duplicate (Neetcode) (Leetcode)
217. Contains Duplicate (Neetcode) (Leetcode)
 
 
230. Kth Smallest Element in a BST (Leetcode)
230. Kth Smallest Element in a BST (Leetcode)
 
 
234. Palindrome Linked List (Leetcode)
234. Palindrome Linked List (Leetcode)
 
 
238. Product of Array Except Self ( Leetcode ) ( optimized )
238. Product of Array Except Self ( Leetcode ) ( optimized )
 
 
24. Swap Nodes in Pairs (Leetcode) (recursive)
24. Swap Nodes in Pairs (Leetcode) (recursive)
 
 
24. Swap Nodes in Pairs (leetcode) (iterative)
24. Swap Nodes in Pairs (leetcode) (iterative)
 
 
242. Valid Anagram (leetcode)
242. Valid Anagram (leetcode)
 
 
25. Reverse Nodes in k-Group (Leetcode) (Constant Space)
25. Reverse Nodes in k-Group (Leetcode) (Constant Space)
 
 
25. Reverse Nodes in k-Group (leetcode)
25. Reverse Nodes in k-Group (leetcode)
 
 
257. Binary Tree Paths (JAVA) Leetcode
257. Binary Tree Paths (JAVA) Leetcode
 
 
268. Missing Number (leetcode)
268. Missing Number (leetcode)
 
 
28. Find the Index of the First Occurrence in a String (leetcode)
28. Find the Index of the First Occurrence in a String (leetcode)
 
 
283. Move Zeroes ( Leetcode )
283. Move Zeroes ( Leetcode )
 
 
287. Find the Duplicate Number (leetcode)
287. Find the Duplicate Number (leetcode)
 
 
289. Game of Life ( Leetcode ) ( Inplace solution )
289. Game of Life ( Leetcode ) ( Inplace solution )
 
 
297. Serialize and Deserialize Binary Tree (Leetcode) (unotimized) (JAVA)
297. Serialize and Deserialize Binary Tree (Leetcode) (unotimized) (JAVA)
 
 
300. Longest Increasing Subsequence ( Leetcode )
300. Longest Increasing Subsequence ( Leetcode )
 
 
31. Next Permutation (Leetcode)
31. Next Permutation (Leetcode)
 
 
322. Coin Change (Leetocde)
322. Coin Change (Leetocde)
 
 
328. Odd Even Linked List (Leetcode)
328. Odd Even Linked List (Leetcode)
 
 
334. Increasing Triplet Subsequence (Leetcode)
334. Increasing Triplet Subsequence (Leetcode)
 
 
36. Valid Sudoku
36. Valid Sudoku
 
 
37. Sudoku Solver (leetcode)
37. Sudoku Solver (leetcode)
 
 
378. Kth Smallest Element in a Sorted Matrix (Leetcode) (maxHeap not optimised)
378. Kth Smallest Element in a Sorted Matrix (Leetcode) (maxHeap not optimised)
 
 
380. Insert Delete GetRandom O(1) (Leetcode)(Unoptimized)
380. Insert Delete GetRandom O(1) (Leetcode)(Unoptimized)
 
 
380. Insert Delete GetRandom O(1) (Leetocode)(Java)
380. Insert Delete GetRandom O(1) (Leetocode)(Java)
 
 
387. First Unique Character in a String (Leetcode) (JAVA)
387. First Unique Character in a String (Leetcode) (JAVA)
 
 
41. First Missing Positive ( leetcode )
41. First Missing Positive ( leetcode )
 
 
44. Wildcard Matching (Hard) (Leetcode) (Unoptimized)
44. Wildcard Matching (Hard) (Leetcode) (Unoptimized)
 
 
443. String Compression (JAVA) (Leetcode)
443. String Compression (JAVA) (Leetcode)
 
 
46. Permutations ( leetcode )
46. Permutations ( leetcode )
 
 
46. Permutations ( leetcode ) ( Backtracking )
46. Permutations ( leetcode ) ( Backtracking )
 
 
47. Permutations 2 ( leetcode )
47. Permutations 2 ( leetcode )
 
 
49. Group Anagrams (JAVA) (Leetcode) (Neetcode)
49. Group Anagrams (JAVA) (Leetcode) (Neetcode)
 
 
49. Group Anagrams (leetcode)
49. Group Anagrams (leetcode)
 
 
496. Next Greater Element I (JAVA) (Optimized) (Monotonic Stack)
496. Next Greater Element I (JAVA) (Optimized) (Monotonic Stack)
 
 
496. Next Greater Element I(JAVA) (unoptimized)
496. Next Greater Element I(JAVA) (unoptimized)
 
 
5. Longest Palindromic Substring ( leetcode )
5. Longest Palindromic Substring ( leetcode )
 
 
509. Fibonacci Number (Leetcode) (optimized)
509. Fibonacci Number (Leetcode) (optimized)
 
 
51. N-Queens ( Leetcode )
51. N-Queens ( Leetcode )
 
 
53. Maximum Subarray ( Leetcode ) ( Kadane's Algorithm )
53. Maximum Subarray ( Leetcode ) ( Kadane's Algorithm )
 
 
54. Spiral Matrix (Leetcode)
54. Spiral Matrix (Leetcode)
 
 
55. Jump Game (leetcode)
55. Jump Game (leetcode)
 
 
56. Merge Intervals (Leetcode)
56. Merge Intervals (Leetcode)
 
 
567. Permutation in String (Leetcode) (Educative)
567. Permutation in String (Leetcode) (Educative)
 
 
62. Unique Paths ( JAVA ) leetcode
62. Unique Paths ( JAVA ) leetcode
 
 
62. Unique Paths (leetcode)
62. Unique Paths (leetcode)
 
 
64. Minimum Path Sum ( Leetcode ) ( optimised )
64. Minimum Path Sum ( Leetcode ) ( optimised )
 
 
695. Max Area of Island ( leetcode )
695. Max Area of Island ( leetcode )
 
 
717. 1-bit and 2-bit Characters (Leetcode) (JAVA)
717. 1-bit and 2-bit Characters (Leetcode) (JAVA)
 
 
72. Edit Distance (Leetcode) (Dynamic Programming)
72. Edit Distance (Leetcode) (Dynamic Programming)
 
 
72. Edit Distance (Leetcode) (Time Limit Exceed) (Brute Force)
72. Edit Distance (Leetcode) (Time Limit Exceed) (Brute Force)
 
 
77. Combinations (Leetcode) (JAVA)
77. Combinations (Leetcode) (JAVA)
 
 
78. Subsets (LEETCODE) using generateSequence approach
78. Subsets (LEETCODE) using generateSequence approach
 
 

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Leetcode-with-random-algo-problems

This repository contains solution to some DSA and Algorithm problems in C++ language

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This repository contains solution to some DSA and Algorithm problems in C++ language

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