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: Wrong Answer)

/*
	Author: Kuldeep
	Date Time:
	Description:
*/
#include <stdio.h>
#include <stdlib.h>
#include<string.h>
#include<math.h>
#include<limits.h>
#include<ctype.h>

typedef long long ll;
#define Min(a,b) (((a)<(b))?(a):(b))
#define Max(a,b) (((a)>(b))?(a):(b))

int main()
{
	float a,b;
	int n, result;
	scanf("%f%f%d",&a,&b,&n);
	result = (floor(b)-ceil(a));
	if(a == 0)
		printf("0\n");
	else 	
		printf("%d\n",result + 1);	
	return 0;
}