#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;
        }
        if(a == b)
        {
            sum++;
        }
    }
    cout << sum;
    return 0;
}