#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,a,b,sum = 0;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> a >> b;
        if (a > b)
        {
            sum += 3;
        }
        else if(a == b) 
        {
            sum += 1;
        }
        else
        {

        }
    }
    cout << sum;
    return 0;
}