#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,x,y,ans=0;
    cin >> n;
    for (int i = 1;i<=n;i++)
    {
        cin >> x>>y;
        if (x>y)
        {
            ans+=3;
        }
        if(x=y)
        {
            ans+=1;
        }
    }
    cout << ans;
    return 0;
}