p02606 AIsing Programming Contest 2020 - Number of Multiples
How many multiples of d are there among the integers between L and R (inclusive)?

Constraints

* All values in input are integers.
* 1 \leq L \leq R \leq 100
* 1 \leq d \leq 100

Input

Input is given from Standard Input in the following format:


L R d


Output

Print the number of multiples of d among the integers between L and R (inclusive).

Examples

Input

5 10 2


Output

3


Input

6 20 7


Output

2


Input

1 100 1


Output

100
```python
l, r, d = map(int, input().split())
ans = (r // d) - ((l - 1) // d)
print(ans)
```