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>
#define _USE_MATH_DEFINES
#include <math.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <string.h>


int L_in;
int R_in;
int d_in;


int main(int argc, char* argv[]){
    int i,j;
    int temp,count;
    count=0;
    scanf("%d %d %d",&L_in,&R_in,&d_in);
    for(i=L_in;i<=R_in;i++){
        if(i % d_in == 0){
            count++;
        }
    }
    printf("%d",count);
    return 0;
}