Problem:
Score : 100 points

Problem Statement

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).

Sample Input 1

5 10 2

Sample Output 1

3

Among the integers between 5 and 10, there are three multiples of 2: 6, 8, and 10.

Sample Input 2

6 20 7

Sample Output 2

2

Among the integers between 6 and 20, there are two multiples of 7: 7 and 14.

Sample Input 3

1 100 1

Sample Output 3

100

Solution in Python (3.8.2) (judge verdict: Wrong Answer)

l, r, D = input().split()
L=int(l)
R=int(r)
d=int(D)
if L%d ==0:
    a=L
else:
    while True: 
	    if L % d:
		    break
    L += 1      
    a=L 
if R%d ==0:
    b=R
else:
    while True: 
	    if R % d:
		    break
    R =R-1     
    b=R
if(b-a<1): 
    print(0)
else:            
    print(int((b-a)/d)+1)