题目链接:https://www.nowcoder.com/acm/contest/139/D 题目描述 Two undirected simple graphs and where are isomorphic when there exists a bijection on V satisfying if and only if {x, y} ∈ E2.Given two graphs and , count the number of graphs satisfying th…
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 find the number of connected components in an undirected graph. Example 1: 0 3 | | 1 --- 2 4 Given n = 5 and…
Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t. All occurrences of a character must be replaced with another character while preserving the order of characters.…
Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors. OJ's undirected graph serialization: Nodes are labeled uniquely. We use # as a separator for each node, and , as a separator for node label and each neigh…
Secret Milking Machine Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 11865 Accepted: 3445 Description Farmer John is constructing a new milking machine and wishes to keep it secret as long as possible. He has hidden in it deep within…
Bees are one of the most industrious insects. Since they collect nectarand pollen from flowers, theyhave to rely on the trees in the forest. For simplicity they numbered the n trees from 0 to n − 1. Insteadof roaming around all over the forest, they…
/* 题意:将两端涂有颜色的木棒连在一起,并且连接处的颜色相同! 思路:将每一个单词看成一个节点,建立节点之间的无向图!判断是否是欧拉回路或者是欧拉路 并查集判通 + 奇度节点个数等于2或者0 */ #include<cstring> #include<cstdio> #include<algorithm> #define N 2500005*2 using namespace std; int f[N]; ]; int rank[N]; int deg[N]; int…
