Leetcode
LC 394 LC 394
Solutions to LeetCode 394 Decode String. LeetCode 394Decode String (Medium) [link] Time complexity O(n). Space complexit
2022-06-27 Stack
Stack
LC 973 LC 973
Solutions to LeetCode 973 K Closest Points to Origin LeetCode 973K Closest Points to Origin (Medium) [link] 1] Python So
2022-06-26 Heap
Heap TopK
LC 937 LC 937
Solutions to LeetCode 937 Reorder Data in Log Files LeetCode 937Reorder Data in Log Files (Medium) [link] class Solutio
2022-06-25 Customized Sort
Customized Sort
Template Summary Template Summary
Template Summary. Template of 0-1 Knapsack Problem0-1 knapsack problem: 2-d dp array: Outer for loop is iterating item
2022-06-24 Summary
Template
Recursion Summary Recursion Summary
Summary of Recursion. LeetCode 77 Combinationsn is the width of the recursion tree. k is the depth of the recursion tree
2022-06-23 Summary
Recursion
Dynamic Programming Summary IV Dynamic Programming Summary IV
Summary of Dynamic Programming IV. LeetCode 300 Longest Increasing SubsequenceDefine dp[i] the longest length of the su
2022-06-22 Summary
Dynamic Programming
Dynamic Programming Summary III Dynamic Programming Summary III
Summary of Dynamic Programming III. (House Robber and Stock) LeetCode 198 House RobberWe can consider recursion as a top
2022-06-21 Summary
Dynamic Programming
Dynamic Programming Summary II Dynamic Programming Summary II
Summary of Dynamic Programming II. (Knapsack problems) LeetCode 416 Partition Equal Subset SumWe want to find a subset o
2022-06-20 Summary
Dynamic Programming
Dynamic Programming Summary I Dynamic Programming Summary I
Summary of Dynamic Programming I. (Basics) DP 5 Steps: Define dp table, i, j Determine recurrent relation Initialize dp
2022-06-19 Summary
Dynamic Programming
Binary Search Tree Summary Binary Search Tree Summary
Summary of Binary Search Tree. LeetCode 700 Search in a Binary Search Tree# Definition for a binary tree node. # class
2022-06-18 Summary
BST
Binary Tree Summary Binary Tree Summary
Summary of Binary Tree. (preorder, inorder, postorder, level-order traversal not included) LeetCode 101 Symmetric Tree#
2022-06-17 Summary
Binary Tree
Stack & Queue Summary Stack & Queue Summary
Summary of Stack & Queue. LeetCode 232 Implement Queue using Stacksclass MyQueue: def __init__(self): s
2022-06-16 Summary
Stack Queue
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