mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
105 lines
2.6 KiB
C++
105 lines
2.6 KiB
C++
#include <stdio.h>
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#include <string.h>
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#include <queue>
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#include <iostream>
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using namespace std ;
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#define MEM(a, v) memset (a, v, sizeof (a))
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#define INF (-1)
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#define MAXN 10000
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struct EDGE {
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int v, w, next ;
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} ;
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bool used[MAXN] ;
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int nz, nr, edgeCnt ;
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int first[MAXN], max_d[MAXN], dist[MAXN] ;
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EDGE edge[20*MAXN] ;
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void add (const int u, const int v, const int w)
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{
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edge[edgeCnt].v = v ;
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edge[edgeCnt].w = w ;
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edge[edgeCnt].next = first[u] ;
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first[u] = edgeCnt++ ;
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}
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void spfa (const int beg)
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{
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int i, d, u, v ;
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queue<int> q ;
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MEM (dist, INF) ;
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MEM (used, 0) ;
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if (max_d[beg] == INF)
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max_d[beg] = 1 ;
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dist[beg] = 1 ;
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used[beg] = 1 ;
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q.push (beg) ;
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while (!q.empty ())
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{
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u = q.front () ;
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q.pop () ;
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used[u] = 0 ;
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for (i = first[u] ; i != -1 ; i = edge[i].next)
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{
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d = dist[u] + edge[i].w ;
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v = edge[i].v ;
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if (dist[v] == INF || dist[v] > d)
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{
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dist[v] = d ;
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if (max_d[v] == INF || max_d[v] < dist[v])
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max_d[v] = dist[v] ;
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if (!used[v])
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{
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q.push (v) ;
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used[v] = 1 ;
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}
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}
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}
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}
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}
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int main ()
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{
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int i, j ;
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int u, v, w ;
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int tcase, mz, minV, id ;
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while (scanf ("%d", &tcase) != EOF)
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{
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while (tcase--)
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{
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MEM (first, -1) ;
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MEM (max_d, INF) ;
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edgeCnt = 0 ;
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scanf ("%d%d", &nz, &nr) ;
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for (i = 0 ; i < nz ; ++i)
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{
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scanf ("%d%d", &u, &mz) ;
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while (mz--)
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{
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scanf ("%d", &v) ;
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add (v, u, 1) ;
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add (u, v, 1) ;
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}
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}
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while (nr--)
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{
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scanf ("%d", &v) ;
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for (i = 0 ; i < v ; ++i)
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{
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scanf ("%d", &u) ;
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spfa (u) ;
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}
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}
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minV = INF ;
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id = -1 ;
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for (i = 0 ; i < MAXN ; ++i)
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if (max_d[i] != INF)
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{
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if (minV == INF || minV > max_d[i])
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{
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minV = max_d[i] ;
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id = i ;
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}
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}
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printf ("%d %d\n", minV, id) ;
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}
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}
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return 0 ;
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}
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