#include <iostream>
using namespace std;
int main()
{
    int ge,shi,bai,qian,n,i;
    cin >> i;
    int arr[i];
    for(int ini = 0;ini <= i - 1;ini++)
    {
        cin >> arr[ini];
    }
    for(int ini = 0;ini <= i - 1;ini++)
    {
        ge = 0;
        shi = 0;
        bai = 0;
        qian = 0;
        ge = arr[ini] % 10;
        shi = arr[ini] % 100 - ge;
        bai = arr[ini] % 1000 - ge - shi * 10;
        qian = (arr[ini] - ge - shi * 10 - bai * 100)/1000;
        if(qian - bai - shi - ge > 0)
        {
            n++;
        }
    }
    cout << n;
    return 0;
}