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Make Sum Divisible by P - Two Sum logic on prefix mod
Array
C++
Hash Table
Medium
Prefix Sum
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LRU Cache - Implementing an LRU Cache in C++: Step-by-Step Guide with Code Examples
C++
Design
Doubly-Linked List
Hash Table
Linked List
Medium
Queue
-
Most Frequent Subtree Sum - Plain and simple DFS
Binary Tree
C++
Depth-First Search
Hash Table
Medium
Tree
-
Greatest Common Divisor Traversal - Prime graph connectivity
Array
C++
Depth-First Search
Hard
Math
Number Theory
Union Find
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Find All People With Secret - UnionFind and Min-Heap solutions
Breadth-First Search
C++
Depth-First Search
Graph
Hard
Heap (Priority Queue)
Sorting
Union Find
-
Cherry Pickup II - Clear concise 2D DP
Array
C++
Dynamic Programming
Hard
Matrix
-
Maximum Good Subarray Sum - Prefix Sum + HashMap
Array
C++
Hash Table
Medium
Prefix Sum
-
Partition Array for Maximum Sum - Top down and bottom up DP
Array
C++
Dynamic Programming
Medium
Memoization