学步园

/*
	http://acm.nyist.net/JudgeOnline/problem.php?pid=679 贪婪的商店
	最短路 或者 树形dp
        很裸的树形dp，要买一件东西，需要再买某些物品，问最少需要花多少钱才能买到那件东西
*/

#include <iostream>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <cctype>
#include <set>
#include <queue>
#include <stack>
#include <string>
using namespace std;
#define CLR(c,v) (memset(c,v,sizeof(c)))

const int INF = (1<<29);
const int inf = -(1<<20);

template < typename _T>
_T Min(_T a,_T b){
    return (a<b)?(a):(b);
}

int dp[10000];
int v[1005];
bool vis[1005];
vector <int > s[1005];

void dfs(int cur){
    if(vis[cur])return;
    int size = s[cur].size();
    if(size == 0){
        dp[cur] = v[cur];return ;
    }
    for(int i = 0 ; i < size ; i++){
        int child = s[cur][i];
        dfs(child);
        vis[child] = true;
        dp[cur] = Min(dp[cur] , dp[child] + v[cur]);
    }
}

int main(){
	freopen("in.txt","r",stdin);
	int Ncase;cin >> Ncase;int cnt = 0;
	while(Ncase -- ){
        int n,m,p;
        cin >> n >> m >> p;
        CLR(vis,0);
        for(int i = 1 ; i <= n ; i ++)
            dp[i] = INF;
        for(int i = 1 ; i <= n ;  i++)
            scanf("%d",&v[i]);
        for(int i = 0 ; i< m ; i++){
            int a,b;
            cin >> a >> b;
            s[a].push_back(b);
        }
        dfs(p);
        printf("Case #%d: %d\n",++cnt , dp[p]);
        for(int i = 1 ; i <= n ; i ++)
            s[i].clear();
    }
	return 0;
}