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Solutions of Leetcode, Codeforces and Cracking the Coding Interview problems.

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.idea

.idea

 
 

Amazon_DeliveryPlan.java

Amazon_DeliveryPlan.java

 
 

Amazon_LargestSmallest.java

Amazon_LargestSmallest.java

 
 

Amazon_ShortestPathIn2DGrid.java

Amazon_ShortestPathIn2DGrid.java

 
 

BFS_DFS.java

BFS_DFS.java

 
 

CTCI_1_1_Is_Unique.java

CTCI_1_1_Is_Unique.java

 
 

CTCI_1_2_Check_Permutation.java

CTCI_1_2_Check_Permutation.java

 
 

CTCI_1_3_URLify.java

CTCI_1_3_URLify.java

 
 

CTCI_1_4_Palindrome_Permutation.java

CTCI_1_4_Palindrome_Permutation.java

 
 

CTCI_1_5_One_Away.java

CTCI_1_5_One_Away.java

 
 

CTCI_1_6_String_Compression.java

CTCI_1_6_String_Compression.java

 
 

CTCI_1_7_Rotate_Matrix.java

CTCI_1_7_Rotate_Matrix.java

 
 

CTCI_1_8_Zero_Matrix.java

CTCI_1_8_Zero_Matrix.java

 
 

CTCI_1_9_String_Rotation.java

CTCI_1_9_String_Rotation.java

 
 

CTCI_2_1_Remove_Dups.java

CTCI_2_1_Remove_Dups.java

 
 

CTCI_2_2_Return_Kth_to_Last.java

CTCI_2_2_Return_Kth_to_Last.java

 
 

CTCI_2_3_Delete_Middle.java

CTCI_2_3_Delete_Middle.java

 
 

CTCI_2_4_Partition.java

CTCI_2_4_Partition.java

 
 

CTCI_2_5_Sum_Lists.java

CTCI_2_5_Sum_Lists.java

 
 

CTCI_2_6_Palindrome.java

CTCI_2_6_Palindrome.java

 
 

CTCI_2_7_Intersection.java

CTCI_2_7_Intersection.java

 
 

CTCI_2_8_Loop_Detection.java

CTCI_2_8_Loop_Detection.java

 
 

CTCI_3_2_Stack_Min.java

CTCI_3_2_Stack_Min.java

 
 

CTCI_3_3_Stack_Of_Plates.java

CTCI_3_3_Stack_Of_Plates.java

 
 

CTCI_3_4_QueueViaStacks.java

CTCI_3_4_QueueViaStacks.java

 
 

CTCI_3_5_SortStack.java

CTCI_3_5_SortStack.java

 
 

CTCI_4_1_RouteBetweenNodes.java

CTCI_4_1_RouteBetweenNodes.java

 
 

CTCI_4_2_MinimalTree.java

CTCI_4_2_MinimalTree.java

 
 

CTCI_4_3_ListofDepths.java

CTCI_4_3_ListofDepths.java

 
 

CTCI_4_4_CheckedBalanced.java

CTCI_4_4_CheckedBalanced.java

 
 

CTCI_4_5_ValidateBST.java

CTCI_4_5_ValidateBST.java

 
 

Hackerrank_2DArrayDS.java

Hackerrank_2DArrayDS.java

 
 

Hackerrank_ArraysLeftRotation.java

Hackerrank_ArraysLeftRotation.java

 
 

Hackerrank_CountingValleys.java

Hackerrank_CountingValleys.java

 
 

Hackerrank_JumpingontheClouds.java

Hackerrank_JumpingontheClouds.java

 
 

Hackerrank_NewYearChaos.java

Hackerrank_NewYearChaos.java

 
 

Hackerrank_RansomNote.java

Hackerrank_RansomNote.java

 
 

Hackerrank_RepeatedString.java

Hackerrank_RepeatedString.java

 
 

Hackerrank_SimpleArraySum.java

Hackerrank_SimpleArraySum.java

 
 

Hackerrank_SockMerchant.java

Hackerrank_SockMerchant.java

 
 

Hackerrank_TwoStrings.java

Hackerrank_TwoStrings.java

 
 

Important Code

Important Code

 
 

Leetcode_1.py

Leetcode_1.py

 
 

Leetcode_100. Same Tree.py

Leetcode_100. Same Tree.py

 
 

Leetcode_101. Symmetric Tree.py

Leetcode_101. Symmetric Tree.py

 
 

Leetcode_102_BinaryTreeLevelOrderTraversal.java

Leetcode_102_BinaryTreeLevelOrderTraversal.java

 
 

Leetcode_103_BinaryTreeZigzagLevelOrderTraversal.java

Leetcode_103_BinaryTreeZigzagLevelOrderTraversal.java

 
 

Leetcode_104. Maximum Depth of Binary Tree.py

Leetcode_104. Maximum Depth of Binary Tree.py

 
 

Leetcode_107. Binary Tree Level Order Traversal II.py

Leetcode_107. Binary Tree Level Order Traversal II.py

 
 

Leetcode_108. Convert Sorted Array to Binary Search Tree.py

Leetcode_108. Convert Sorted Array to Binary Search Tree.py

 
 

Leetcode_110. Balanced Binary Tree.py

Leetcode_110. Balanced Binary Tree.py

 
 

Leetcode_111. Minimum Depth of Binary Tree.py

Leetcode_111. Minimum Depth of Binary Tree.py

 
 

Leetcode_112. Path Sum.py

Leetcode_112. Path Sum.py

 
 

Leetcode_118. Pascal's Triangle.py

Leetcode_118. Pascal's Triangle.py

 
 

Leetcode_119. Pascal's Triangle II.py

Leetcode_119. Pascal's Triangle II.py

 
 

Leetcode_11_ContainerWithMostWater.java

Leetcode_11_ContainerWithMostWater.java

 
 

Leetcode_121. Best Time to Buy and Sell Stock.py

Leetcode_121. Best Time to Buy and Sell Stock.py

 
 

Leetcode_121_BestTimetoBuyandSellStock.java

Leetcode_121_BestTimetoBuyandSellStock.java

 
 

Leetcode_122. Best Time to Buy and Sell Stock II.py

Leetcode_122. Best Time to Buy and Sell Stock II.py

 
 

Leetcode_124_BinaryTreeMaximumPathSum.java

Leetcode_124_BinaryTreeMaximumPathSum.java

 
 

Leetcode_125. Valid Palindrome.py

Leetcode_125. Valid Palindrome.py

 
 

Leetcode_127_WordLadder.java

Leetcode_127_WordLadder.java

 
 

Leetcode_128_LongestConsecutiveSequence.java

Leetcode_128_LongestConsecutiveSequence.java

 
 

Leetcode_12_IntegertoRoman.java

Leetcode_12_IntegertoRoman.java

 
 

Leetcode_13.py

Leetcode_13.py

 
 

Leetcode_134__GasStation.java

Leetcode_134__GasStation.java

 
 

Leetcode_136. Single Number.py

Leetcode_136. Single Number.py

 
 

Leetcode_138_CopyListwithRandomPointer.java

Leetcode_138_CopyListwithRandomPointer.java

 
 

Leetcode_139_WordBreak.java

Leetcode_139_WordBreak.java

 
 

Leetcode_14.py

Leetcode_14.py

 
 

Leetcode_141. Linked List Cycle.py

Leetcode_141. Linked List Cycle.py

 
 

Leetcode_141_LinkedListCycle.java

Leetcode_141_LinkedListCycle.java

 
 

Leetcode_142_LinkedListCycleII.java

Leetcode_142_LinkedListCycleII.java

 
 

Leetcode_146_LRUCache.java

Leetcode_146_LRUCache.java

 
 

Leetcode_150_EvaluateReversePolishNotation.java

Leetcode_150_EvaluateReversePolishNotation.java

 
 

Leetcode_151_ReverseWordsinaString.java

Leetcode_151_ReverseWordsinaString.java

 
 

Leetcode_155. Min Stack.py

Leetcode_155. Min Stack.py

 
 

Leetcode_155_Min_Stack.java

Leetcode_155_Min_Stack.java

 
 

Leetcode_15_3Sum.java

Leetcode_15_3Sum.java

 
 

Leetcode_160. Intersection of Two Linked Lists.py

Leetcode_160. Intersection of Two Linked Lists.py

 
 

Leetcode_165_CompareVersionNumbers.java

Leetcode_165_CompareVersionNumbers.java

 
 

Leetcode_167. Two Sum II - Input array is sorted.py

Leetcode_167. Two Sum II - Input array is sorted.py

 
 

Leetcode_168. Excel Sheet Column Title.py

Leetcode_168. Excel Sheet Column Title.py

 
 

Leetcode_169. Majority Element.py

Leetcode_169. Majority Element.py

 
 

Leetcode_16_3SumClosest.java

Leetcode_16_3SumClosest.java

 
 

Leetcode_171. Excel Sheet Column Number.py

Leetcode_171. Excel Sheet Column Number.py

 
 

Leetcode_172. Factorial Trailing Zeroes.py

Leetcode_172. Factorial Trailing Zeroes.py

 
 

Leetcode_17_LetterCombinationsofaPhoneNumber.java

Leetcode_17_LetterCombinationsofaPhoneNumber.java

 
 

Leetcode_186_ReverseWordsinaStringII.java

Leetcode_186_ReverseWordsinaStringII.java

 
 

Leetcode_189. Rotate Array.py

Leetcode_189. Rotate Array.py

 
 

Leetcode_190. Reverse Bits.py

Leetcode_190. Reverse Bits.py

 
 

Leetcode_191. Number of 1 Bits.py

Leetcode_191. Number of 1 Bits.py

 
 

Leetcode_199_BinaryTreeRightSideView.java

Leetcode_199_BinaryTreeRightSideView.java

 
 

Leetcode_19_RemoveNthNodeFromEndofList.java

Leetcode_19_RemoveNthNodeFromEndofList.java

 
 

Leetcode_1_Two_Sum.java

Leetcode_1_Two_Sum.java

 
 

Leetcode_20.py

Leetcode_20.py

 
 

Leetcode_200_NumberofIslands.java

Leetcode_200_NumberofIslands.java

 
 

Leetcode_202_HappyNumber.java

Leetcode_202_HappyNumber.java

 
 

Leetcode_203. Remove Linked List Elements.py

Leetcode_203. Remove Linked List Elements.py

 
 

Leetcode_204. Count Primes.py

Leetcode_204. Count Primes.py

 
 

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Solutions of Leetcode, Codeforces and Cracking the Coding Interview problems.

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python java linked-list leetcode array cracking-the-coding-interview hashmap dynamic-programming problem-solving hashtable programming-interviews
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