parimpar1

#include <fstream>
using namespace std;

int main()
{
    int n,a,frecv[6]={0},frecv2[6]={0},s=0;
    ifstream f("parimpar1.in");
    f>>n;
    for(int i=1;i<=n;++i)
	    f>>a,++frecv[a];
    for(int i=1;i<=n;++i)
	    f>>a,++frecv2[a];
    f.close();
    for(int i=0;i<=5;++i)
	    if(frecv[i])
	        for(int j=0;j<=5;++j)
                if(!((i-j)%2==0)&&frecv2[j])
		            s=s+i*j*frecv[i]*frecv2[j];
    ofstream g("parimpar1.out");
    g<<s;
    g.close();
	return 0;
}