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: Accepted)

import itertools
import decimal
import math
import collections
import sys
#input = sys.stdin.readline
import copy

# S=(input())
# N=int(input())
# N,K=map(int,input().split())
# ListA=list(map(int,input().split()))
# ListA.sort()#reverse=True)

def resolve():
    
    L,R,d=map(int,input().split())

    cnt=0
    for i in range(L,R+1):
        if(i%d==0):
            cnt+=1

    print(cnt)



resolve()