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,i,n;
    double x;
    n=0;

    scanf("%d %d %d",&L,&R,&d);
    
    if( L>=1 && L<=100 && R>=1 && R<=100 && L<=R && d>=1 && d<=100){
            for(i=L;i<=R;i++){
                x = i%d;
                if(x==0){
                    n++;
                }
        }
    }


        printf("%d\n",n);


    return 0;
}