#include <fstream>

using namespace std;

ifstream in("panou.in");
ofstream out("panou.out");

int l[500], c[500];
int main()
{
    bool  A[500][500], B[500][500] ;
    int n, cnt = 0 ;

    in >> n;
    for (int i=0 ;i < n;i++)
    {
        for(int j = 0;j < n;j++)
            in >> A[i][j];
    }

    for (int i=0 ;i < n;i++)
    {
        for(int j = 0;j < n;j++)
            in >> B[i][j];
    }

    for(int i = n-1 ;i >= 0;i--)
    {
        if( (A[i][i] + l[i] + c[i])%2 != B[i][i])
        {
            l[i]++;
            c[i]++;
            cnt++;
        }

        for(int j = i-1; j >= 0 ;j--)
        {
            if( (A[j][i] + c[i] + l[j]) %2!=B[j][i] )
            {
                l[j]++;
                c[i]++;
                cnt++;
            }
            if( (A[i][j] + l[i] + c[j]) %2!=B[i][j] )
            {
                l[i]++;
                c[j]++;
                cnt++;
            }
        }
    }
    out << cnt;

    return 0;
}