题意 1-n排列,构成一个圆;1-n每个点有个值0或者1,0代表点的度为偶数,1代表点的度为计数;询问能否构成一棵树,树的连边在圆内不会相交,在圆边上可以相交,可以则输出方案。 提示 1. 首先考虑什么时候无解,...
2022-12-01站长百科Circular,Codeforces,Spanning,treeE. Minimum spanning tree for each edge Connected undirected weighted graph without self-loops and multiple edges is given. Graph contains n vertices and m edges. For each...
2022-10-25技术教程Codeforces,Educational,Minimum,Spanning,数据结构E. Minimum spanning tree for each edge 题目连接: http://www.codeforces.com/contest/609/problem/E Description Connected undirected weighted graph without self-loops and multiple edges is given. Gra...
2022-10-25技术教程Codeforces,Educational,Minimum,Spanning,最大值time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output A group of n cities is connected by a network of roads. There is an undirected road bet...
2022-10-25技术教程Codeforces,Spanning,tree