#include <bits/stdc++.h>
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++;
		 } 
	}
	cout << num;
	return 0;
}