if there are three cells A, B and C, not touching nor overlapping each other, at least three plans are possible in order to connect all three cells. The first is to build corridors A-B and A-C, the second B-C an
memset(vis,false,sizeofvis); priority_queue<pdi, vector<pdi>, cmp>q;for(inti =1; i <= n; i++){ dist[i]=val[s][i]; q.push(make_pair(dist[i], i)); } vis[s]=true;while(!q.empty()){ pdi u=q.top(); q.pop();if(vis[u.second])continue; vis[u.second]=true; ans...
http://poj.org/problem?id=2031 #include<iostream> #include<algorithm> #include<cmath> #include<cstdio> using namespace std; double a[101][4]; double esp = 0.0000001; struct edge { int u,v; double w; } e[5000]; int tree[101]; int cmp( const void *a ,const void *b) { retu...
inti, j, p; doubleminc, res=0; memset(vis,0,sizeof(vis)); vis[0]=1; for(i=1; i<n; i++) lowc[i]=cost[0][i]; for(i=1; i<n; i++) { minc=inf; p=-1; for(j=0; j<n; j++) if(0==vis[j]&&minc>lowc[j]) { minc=lowc[j]; p=j; } if(inf==minc) re...
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surfaces. It can be made arbitrarily long, but of course the shortest one is chosen. Even if two corridors A-B and C-D intersect in space, they are not considered to form a connection path between (for example) A and C. In other words, you may consider that two corridors never ...
#include<cstring> #include<cstdio> #include<queue> #include<math.h> #include<vector> usingnamespacestd; #definemaxn 105 structpoint{doublex, y, z, r;}p[maxn]; structnode { intu, v; doublelen; friendbooloperator< (node a, node b) ...