#include <iostream>
using namespace std;
int main()
{
    int n, a, b, num = 0;
	cin >> n;
	for (int i = 1; i <= n; i++)
	{
		cin >> a >> b;
		if (a > b)
		{
			num += 3;
		}
		else if (a == b)
		{
			num += 1;
		}
		else
		{
			num += 0;
		}
	}
	cout << num;
	return 0;
}