英语翻译Your task is so easy.I will give you an undirected graph,and you just need to tell me whether the graph is just a circle.A cycle is three or more nodes V1,V2,V3,...Vk,such that there are edges between V1 and V2,V2 and V3,...Vk and V1,with
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英语翻译Your task is so easy.I will give you an undirected graph,and you just need to tell me whether the graph is just a circle.A cycle is three or more nodes V1,V2,V3,...Vk,such that there are edges between V1 and V2,V2 and V3,...Vk and V1,with
英语翻译
Your task is so easy.I will give you an undirected graph,and you just need to tell me whether the graph is just a circle.A cycle is three or more nodes V1,V2,V3,...Vk,such that there are edges between V1 and V2,V2 and V3,...Vk and V1,with no other extra edges.The graph will not contain self-loop.Furthermore,there is at most one edge between two nodes.
Input
There are multiple cases (no more than 10).
The first line contains two integers n and m,which indicate the number of nodes and the number of edges (1 < n < 10,1
英语翻译Your task is so easy.I will give you an undirected graph,and you just need to tell me whether the graph is just a circle.A cycle is three or more nodes V1,V2,V3,...Vk,such that there are edges between V1 and V2,V2 and V3,...Vk and V1,with
你的任务很简单.我会给你一个无向图,你需要告诉我这个图标是否仅仅是个圆圈.一个圆圈有3个或3个以上的节点V1,V2,V3……Vk等等,这样一来,V1与V2,V2与V3,……Vk与V1间就会有很多条棱,并且不会有多余的棱.这个图标不会有自循环,两个节点间最多有一条棱.
输入
有很多种情况（不超过10）
第一条线包含两个整数n和m,表明节点的数量和节点之间棱的数量（1 < n < 10,1