Light OJ 1111 – Best Picnic Ever

Problem Link: http://www.lightoj.com/volume_showproblem.php?problem=1111


/*
 +-+ +-+ +-+
 |R| |.| |S|
 +-+ +-+ +-+
 */

#include <bits/stdc++.h>

#define pii pair <int,int>
#define sc scanf
#define pf printf
#define Pi 2*acos(0.0)
#define ms(a,b) memset(a, b, sizeof(a))
#define pb(a) push_back(a)
#define MP make_pair
#define db double
#define ll long long
#define EPS 10E-10
#define ff first
#define ss second
#define sqr(x) (x)*(x)
#define D(x) cout<<#x " = "<<(x)<<endl
#define VI vector <int>
#define DBG pf("Hi\n")
#define MOD 100007
#define MAX 1010
#define CIN ios_base::sync_with_stdio(0); cin.tie(0)
#define SZ(a) (int)a.size()
#define sf(a) scanf("%d",&a)
#define sff(a,b) scanf("%d%d",&a,&b)
#define sfff(a,b,c) scanf("%d%d%d",&a,&b,&c)
#define loop(i,n) for(int i=0;i<n;i++)
#define REP(i,a,b) for(int i=a;i<b;i++)
#define TEST_CASE(t) for(int z=1;z<=t;z++)
#define PRINT_CASE printf("Case %d: ",z)
#define all(a) a.begin(),a.end()
#define intlim 2147483648
#define inf 1000000
#define ull unsigned long long

using namespace std;

vector<int>v[MAX],people;
int dfs_cnt[MAX];
bool visited[MAX];
int n,k,ans;

void clr()
{
 loop(i,n+1)
 {
 v[i].clear();
 dfs_cnt[i]=0;
 }
}

void dfs(int x)
{
 visited[x]=1;
 dfs_cnt[x]++;
 if(dfs_cnt[x]==k)
 ans++;
 loop(i,SZ(v[x]))
 {
 int u=v[x][i];
 if(!visited[u])
 dfs(u);
 }
}

int main()
{
 ///freopen("in.txt","r",stdin);
 ///freopen("out.txt","w",stdout);

 int t,m,temp;
 sf(t);
 TEST_CASE(t)
 {
 sfff(k,n,m);

 loop(i,k)
 {
 sf(temp);
 people.pb(temp);
 }

 int a,b;

 loop(i,m)
 {
 sff(a,b);
 v[a].pb(b);
 }

 ans=0;

 loop(j,SZ(people))
 {
 loop(i,n+2)
 visited[i]=0;
 dfs(people[j]);
 }

 PRINT_CASE;
 pf("%d\n",ans);
 clr();
 people.clear();
 }
 return 0;
}

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