#186. Bus (45 seats)
n students go on a trip. One bus takes 45 people. What is the smallest number of buses they need?
### Input
One integer n (1 ≤ n ≤ 1000).
### Output
The number of buses.
Examples
Input
153
Output
4
Input
642
Output
15
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.