#include <iostream>
using namespace std;
int main()
{
int i, count;
const int n = 40;
count = 0;
int a [n];
for (i = 0; i < n; i++)
cin >> a [i];
for (i = 0; i < n - 1; i++)
if (a [i] != a [n - 1])
count++;
cout << count << endl;
return 0;
}