Posted on Mon 06 January 2025 in Leetcode • Tagged with binary-tree-traversal-level-order, bfs-layered, recursion
Question Link : https://leetcode.com/problems/binary-tree-level-order-traversal/
Difficulty: Medium
Premium: False
Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level). Example 1:
Input: root = [3,9,20,null,null,15,7] Output: [[3 …
Posted on Sat 04 January 2025 in Leetcode • Tagged with topological-sorting, bfs-layered
Question Link : https://leetcode.com/problems/course-schedule/
Difficulty: Medium
Premium: False
There are a total of numCourses courses you have to take, labeled from 0 to numCourses - 1. You are given an array prerequisites where prerequisites[i] = [ai, bi] indicates that you must take course bi first if you …
Posted on Sat 04 January 2025 in Leetcode • Tagged with bfs-layered, bfs-grid
Question Link : https://leetcode.com/problems/as-far-from-land-as-possible/
Difficulty: Medium
Premium: False
Given an n x n grid containing only values 0 and 1, where 0 represents water and 1 represents land, find a water cell such that its distance to the nearest land cell is maximized, and return the …