#include <bits/stdc++.h>
using namespace std;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	
	int n, res = 0;
	cin >> n;
	
	vector <vector <int>> g(n + 1, vector<int>(n));
	
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			cin >> g[i][j];
		}
	}
	
	for (int i = 0; i < n; i++) {
		cin >> g[n][i];
	}
	
	for (int i = 0; i < n ; i++) {
		for (int j = i; j < n; j++) {
			if (
				g[i][j] == 1 &&
				g[n][i] != g[n][j]
			) {
				res++;
			}
		}
	}
	
	cout << res;	
	return 0;
}