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Referral Count Microservice Dependency - load factor Offset commit Course schedule mid...

TreeMap + DLL A DoubleLinkedList to simulate the stack and allow O(1) removals. A Tree...

bfs + dfs Use BFS to: Build a graph of valid paths using a parent map Note1: node coul...

BFS We are given a beginWord and an endWord. Let these two represent start node and en...

O(NlogN) 先找中点，然后分别left right O(logN) leftmost element in the inorder traversal has to ...

// 当前cur是否存留 boolean alive = true; // 只有top+， cur-，才会相遇 whi...

Alien base attack O(n) o(1) Page fetch multi stream...

GetRand 1 // Question: // In this problem, you're asked to implement a data structure ...

```java class Solution { public int paintWalls(int[] cost, int[] time) { int n = cost....

Role permission 0 Role permission 1 Role permission 2 prefix map graph coloring event ...

Solutionap { Map<String, ArrayList<Pair<Integer, String>>> map; public TimeMap() { /...

Solution: Binary search We remove nums[mid], resulting in left half arr and right half...

Solution: sliding window O(∣S∣+∣T∣) t may include duplicates, so we need to count freq...

Solution 1: check if loop exist Solution 2: Using graph property Check whether or not ...

Solution BFS we will perform a level-wise BFS iteration over the nodes level limited b...

SolutionidWlkIjoiMjMwNDIyNjM5OTg5MzA3MCJ9&rk3s=e9ecf3d6&x-orig-authkey=f32326d3454f2ac...

Solution Build graph and BFS The direction of edge indicates the order of division, an...

Solution1 level order traversal O(N)O(N) Solution2: using established linkedlist O(N)O...

Solution1: O(N) O(N) Level order traversal Solution2 : O(N) O(1) when we go over the n...

Solution: average time O(h) worst case is O(n) Find seperately....