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摘要： Given n nodes in a graph labeled from 1 to n. There is no edges in the graph at beginning. You need to support the following method: 1. connect(a, b), 阅读全文

摘要： Find the number Weak Connected Component in the directed graph. Each node in the graph contains a label and a list of its neighbors. (a weak connected 阅读全文

摘要： Find the number connected component in the undirected graph. Each node in the graph contains a label and a list of its neighbors. (a connected compone 阅读全文

摘要： Six degrees of separation is the theory that everyone and everything is six or fewer steps away, by way of introduction, from any other person in the 阅读全文

摘要： Deep clone an undirected graph. Each node in the graph contains a label and a list of its neighbors. How we serialize an undirected graph: Nodes are l 阅读全文

摘要： Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to check whether these edges mak 阅读全文

摘要： Given a undirected graph, a node and a target, return the nearest node to given node which value of it is target, return NULL if you can't find. There 阅读全文

摘要： Given an integer array, heapify it into a min-heap array. For a heap array A, A[0] is the root of heap, and for each A[i], A[i * 2 + 1] is the left ch 阅读全文

摘要： There are a total of n courses you have to take, labeled from 0 to n - 1.Some courses may have prerequisites, for example to take course 0 you have to 阅读全文

摘要： There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you have t 阅读全文