#include<iostream>
using namespace std;
class counter{
    public:
    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;
    }
    for(int i=0;i<n;i++){
        counter obj;
    }
    cout<<Counter::count<<endl;
    return 0;
}