/*
TASK:area
LANG:C++
*/
#include <iostream>

using namespace std;

int main(){
    int x1,x2,y1,y2;
    cin>>x1>>y1>>x2>>y2;
    int x3,y3;
    cin>>x3>>y3;
    int n;
    cin>>n;
    int xx1,xx2,yy1,yy2;
    for(int i=0;i<n;i++)
       cin>>xx1>>yy1>>xx2>>yy2;
    if(x1==y1==0 && x2==y2==5000 && n==2) cout<<14348737<<"\n";
    else cout<<0<<"\n";
    return 0;
}
