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: Runtime Error)

from math import sqrt
N=int(input())
num=1
def checker(n):
    hoge=n
    if hoge>2:
        hoge=n-2
    count=0
    x=1
    for a in range(int(sqrt(hoge))):
        y=1
        for b in range(int(sqrt(hoge))):
            z=1
            for c in range(int(sqrt(hoge))):
                ans=x*x+y*y+z*z+x*y+x*z+z*y
                if ans==n:
                    count=count+1
                z=z+1
            y=y+1
        x=x+1
    return count
for i in range(N):
    print(checker(num)) 
    num=num+1