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: Runtime Error)

#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int countd(int l, int r, int d) {
    int count = 0;
    for (int i = l; i <= r; i++) {
        if (i % d == 0) {
            count++;
        }
    }
    return count;
}

int main(int argc, char **argv) {
    int l, r, d, ans;
    l = atoi(argv[1]);
    r = atoi(argv[2]);
    d = atoi(argv[3]);
    ans = countd(l, r, d);
    printf("%d\n", ans);
    return 0;
}