int counter = 0;
		BigDecimal  factorial = new BigDecimal(1);

           // throw new UnsupportedOperationException (String.format("countZeroes (%d)",input1));


		for (int i = 2; i <= input1; i++) {
            factorial=factorial.multiply(BigDecimal.valueOf(i));
        }

        String[] stack = String.valueOf(factorial).split("");

        for (int i = stack.length-1; i > 0; i--) {
            if(stack[i].equals("0")){
                counter++;
            }
            else break;
        }
		return counter;