#include <fstream>
#include <vector>
#include <queue>
#include <stack>

using namespace std;
ifstream cin("obiective.in");
ofstream cout("obiective.out");
int n,m,t,MX;
vector<int> G[32005],curr,cg[32005];
vector<pair<int,int>> A[32005];
vector<vector<int>> ctc;
int idx[32005],low[32005],id,v[32005],inStk[32005],cnt,comp[32005];
stack<int> Stk;
void getCtc(int node)
{
    curr.clear();
    while(!Stk.empty())
    {
        auto x=Stk.top();
        Stk.pop();
        inStk[x]=0;
        curr.push_back(x);
        if(x==node)
            break;
    }
    ctc.push_back(curr);
}
void Dfs(int x)
{
    v[x]=1;
    Stk.push(x);
    inStk[x]=1;
    id++;
    idx[x]=id; low[x]=id;
    for(auto y:G[x])
    {
        if(!v[y]) ///fiu
        {
            Dfs(y);
            low[x]=min(low[x],low[y]);
        }
        else
            if(inStk[y]) ///back edge
                low[x]=min(low[x],low[y]);
    }
    if(low[x]==idx[x]) ///last
        getCtc(x);
}
void Tarjan()
{
    for(int x=1;x<=n;x++)
        if(!v[x])
            Dfs(x);
    /*for(auto x:ctc)
    {
        for(auto y:x)
            cout<<y<<" ";
        cout<<"\n";
    }*/
}
void unic(vector<int> &v)
{
    sort(v.begin(),v.end());
    auto last=unique(v.begin(),v.end());
    v.erase(last,v.end());
}
void bfs(int x)
{

}
int main()
{
    cin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int u,v;
        cin>>u>>v;
        G[u].push_back(v);
    }
    Tarjan();
    for(auto v:ctc)
    {
        cnt++;
        for(auto x:v)
            comp[x]=cnt;
    }
    for(int x=1;x<=n;x++)
    {
        for(auto y:G[x])
        {
            if(comp[x]!=comp[y])
                cg[comp[x]].push_back(comp[y]);
        }
    }
    for(int x=1;x<=cnt;x++)
    {
        unic(cg[x]);
        for(auto y:cg[x])
        {
            A[x].emplace_back(y,0);
            A[y].emplace_back(x,1);
            MX++;
        }
    }
    cin>>t;
    while(t--)
    {
        int x,y;
        cin>>x>>y;
        //bfs(comp[x]);
        //cout<<dp[comp[y]]<<"\n";
    }
    return MX;
}