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LeetCode : Medium

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String to Integer (atoi)
String
8
String to Integer (atoi)
String
8
Merge Intervals
Array
Sorting
56
Merge Intervals
Array
Sorting
56
Populating Next Right Pointers in Each Node
Tree
Depth-First Search
Breadth-First Search
Binary Tree
116
Populating Next Right Pointers in Each Node
Tree
Depth-First Search
Breadth-First Search
Binary Tree
116
Gas Station
Array
Greedy
134
Gas Station
Array
Greedy
134
Linked List Cycle II
Hash Table
Linked List
Two Pointers
142
Linked List Cycle II
Hash Table
Linked List
Two Pointers
142
Reorder List
Linked List
Two Pointers
Stack
Recursion
143
Reorder List
Linked List
Two Pointers
Stack
Recursion
143
LRU Cache
Hash Table
Linked List
Design
Doubly-Linked List
146
LRU Cache
Hash Table
Linked List
Design
Doubly-Linked List
146
Insertion Sort List
Linked List
Sorting
147
Insertion Sort List
Linked List
Sorting
147
Rotate Array
Array
Math
Two Pointers
189
Rotate Array
Array
Math
Two Pointers
189
Course Schedule II
Depth-First Search
Breadth-First Search
Graph
Topological Sort
210
Course Schedule II
Depth-First Search
Breadth-First Search
Graph
Topological Sort
210
Design Add and Search Words Data Structure
String
Depth-First Search
Design
Trie
211
Design Add and Search Words Data Structure
String
Depth-First Search
Design
Trie
211
Maximal Square
Array
Dynamic Programming
Matrix
221
Maximal Square
Array
Dynamic Programming
Matrix
221
Basic Calculator II
Math
String
Stack
227
Basic Calculator II
Math
String
Stack
227
Minimum Height Trees
Depth-First Search
Breadth-First Search
Graph
Topological Sort
310
Minimum Height Trees
Depth-First Search
Breadth-First Search
Graph
Topological Sort
310
Linked List Random Node
Linked List
Math
Reservoir Sampling
Randomized
382
Linked List Random Node
Linked List
Math
Reservoir Sampling
Randomized
382
Decode String
String
Stack
Recursion
394
Decode String
String
Stack
Recursion
394
Partition Equal Subset Sum
Array
Dynamic Programming
416
Partition Equal Subset Sum
Array
Dynamic Programming
416
Maximum XOR of Two Numbers in an Array
Array
Hash Table
Bit Manipulation
Trie
421
Maximum XOR of Two Numbers in an Array
Array
Hash Table
Bit Manipulation
Trie
421
Minimum Number of Arrows to Busrt Balloons
Array
Greedy
Sorting
452
Minimum Number of Arrows to Busrt Balloons
Array
Greedy
Sorting
452
Insert into a Binary Search Tree
Tree
Binary Search Tree
Binary Tree
701
Insert into a Binary Search Tree
Tree
Binary Search Tree
Binary Tree
701
Domino and Tromino Tiling
Dynamic Programming
790
Domino and Tromino Tiling
Dynamic Programming
790
Maximize Distance to Closest Person
Array
849
Maximize Distance to Closest Person
Array
849
Koko Eating Bananas
Array
Binary Search
875
Koko Eating Bananas
Array
Binary Search
875
K Closest Points to Origin
Array
Math
Divide and Conquer
Geometry
Sorting
Heap (Priority Queue)
Quickselect
973
K Closest Points to Origin
Array
Math
Divide and Conquer
Geometry
Sorting
Heap (Priority Queue)
Quickselect
973
Pairs of Songs With Total Durations Divisible by 60
Array
Hash Table
Counting
1010
Pairs of Songs With Total Durations Divisible by 60
Array
Hash Table
Counting
1010
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