学步园

#include<stdio.h>
#include<string.h>
#include <iostream>
#include <queue>
using namespace std;
#define MAXN 205
#define MAXE 300005
#define INF 10000000
int heada[MAXN], headb[MAXN];
int dp[MAXN];
int cnta, cntb;
struct Edge{
    int node;
    int next;
};
struct Edge edgea[MAXE], edgeb[MAXE];
int rem[MAXE], cnt;
queue<int> que;
void adda(int a, int b)
{
    edgea[cnta].node = b; edgea[cnta].next = heada[a]; heada[a] = cnta ++;
}
void addb(int a, int b)
{
    edgeb[cntb].node = b; edgeb[cntb].next = headb[a]; headb[a] = cntb ++;
}

void spafa(int root, int fa)
{
    dp[root] = 0;
    while(!que.empty())que.pop();
    que.push(root);
    while(!que.empty())
    {
        int now = que.front();
        que.pop();
        for(int i = heada[now]; ~i; i = edgea[i].next)
        {
            if(edgea[i].node != fa)
            {
                if(dp[edgea[i].node] > dp[now] + 1)
                {
                    que.push(edgea[i].node);
                    dp[edgea[i].node] = dp[now] + 1;
                }
            }
        }
    }
    return ;
}
void spafb(int root, int fa)
{
    dp[root] = 0;
    while(!que.empty())que.pop();
    que.push(root);
    while(!que.empty())
    {
        int now = que.front();
        que.pop();
        for(int i = headb[now]; ~i; i = edgeb[i].next)
        {
            if(edgeb[i].node != fa)
            {
                if(dp[edgeb[i].node] > dp[now] + 1)
                {
                    que.push(edgeb[i].node);
                    dp[edgeb[i].node] = dp[now] + 1;
                }
            }
        }
    }
    return ;
}

int main()
{
    int T, n, t, D1, D2, A, B;
    for(scanf("%d", &T); T--;)
    {
        char ch;
        scanf("%d%d", &n, &t);
        memset(heada, -1, sizeof(heada));
        memset(headb, -1, sizeof(headb));
        cnta = cntb = 0;
        while(t--)
        {
            cnt = 0;
            scanf("%c", &ch);
            scanf("%d%c", &A, &ch);
            rem[++cnt] = A;
            while(ch != ' ')
            {
                scanf("%d%c", &A, &ch);
                rem[++cnt] = A;
            }
            int k;
            scanf("%d", &k);
            if(k)
            {
                for(int i = 2; i <= cnt; ++i)
                {
                    adda(rem[i - 1], rem[i]);
                    addb(rem[i - 1], rem[i]);
                }
            }
            else
            {
                for(int i = 2; i <= cnt; ++i)
                addb(rem[i - 1], rem[i]);
            }
        }
        scanf("%d%d", &D1, &D2);
        scanf("%d%d", &A, &B);

        for(int i = 1; i <= n; ++i)
            dp[i] = INF;
        spafa(A, -1);
        int a = dp[B];

        for(int i = 1; i <= n; ++i)
            dp[i] = INF;
        spafb(A, -1);
        int b;
        b = dp[B];
        if((a == INF) && (b == INF))
            printf("-1\n");
        else
        {
            int ans = INF;
            if(a != INF)
            {
                if(ans > a * D2)
                    ans = a * D2;
            }
            if(b != INF)
            {
                if(ans > b * D1)
                    ans = b * D1;
            }
            printf("%d\n", ans);
        }
    }
    return 0;
}