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