Scanner vstup = new Scanner (System.in);
        System.out.println("zadaj vysku strechy : ");
       int n = vstup.nextInt();
         for (int i= 1; i <= n; i++) {
        for (int j=1; j <=n - i ; j++){
            System.out.print(' ');
        }
         for (int j= 1; j <= 2*i-1; j++) {
         System.out.print('*');


    }
             System.out.println();
    }
}
}