Leetcode 2445. Number of Nodes With Value One
Given a tree (or graph) whose nodes are labeled 0 or 1 and a set of rules/operations that change node values based on ancestors or path flips, determine how many nodes end up with value 1. This typically requires a DFS/BFS that carries a cumulative flip/XOR state (or other propagated state) and careful bookkeeping to apply updates efficiently.
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Mid January, 2025
Mid-level
Number of Islands in a Binary Tree: Given a Binary tree having nodes with value 0 and 1, write a function to return the number of islands
Mid January, 2025
Mid-level
Number of Islands in a Binary Tree: Given a Binary tree having nodes with value 0 and 1, write a function to return the number of islands
Early September, 2024
Mid-level
Given a binary tree with nodes having values 0 and 1, return the number of islands of 1s. An island of 1 is defined as a group of ones surrounded by zeroes or at the boundary of the tree.
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