#include<iostream>
using namespace std;
class Counter {
    static int count;
    Counter() {
        count++;
    }
};
int Counter::count = 0;
int main() {
    int n;
    cin >> n;
    if(n < 1 || n > 1000){
        cout << "Invalid input" << endl;
        return 0;
    }
    Counter objects[n];
    cout << Counter::count << endl;
    return 0;
}