399.Evalutate Division
make use of graph, and disjoint set to find division rate
Recent posts
979.Distribute Coins in Binary Tree
practice to DFS
Detect Cycle in an Undirected Graph
using disjoint set, easily check if a graph has any cycle.
1302.Deepest Leaves Sum
practice to DFS
105.Construct Binary Tree from Preorder and Inorder Traversal
practice of binary tree traversal