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 C (GCC 9.2.1) (judge verdict: Accepted)

#include<stdio.h>
int main(void)
{
    int l, r, d, wa, i;
    scanf("%d %d %d",&l ,&r ,&d);
    wa = 0;
    while (l <= r)
    {
        if (l % d == 0)
        {
            wa = wa + 1;
        }
        l++;
    }
    
    // for ( i = l; i < (r + 1); i++)
    // {
    //     if (i % d == 0)
    //     {
    //         wa = wa + 1;
    //     }
        
    // }
    printf("%d", wa);
    return 0;
}