#include <iostream>

using namespace std;

int main(){
    int n;
    int br_tocka=1;
    cout<<"Unesite N (1-80)\n";
    cin>>n;
    for(int i = 0; i<n; i++){
        for(int j=0; j<br_tocka; j++)
            cout<<".";
        cout<<"\n";
        br_tocka++;
    }
    return 0;
}