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++ (Clang 10.0.0) (judge verdict: Wrong Answer)


#include <cstdint>
#include <string>
#include <iostream>

int main(int argc, char* argv[])
{
	int32_t L, R, d;
	std::cin >> L;
	std::cin >> R;
	std::cin >> d;
	int cnt = 0;
	for (int i = L; i <= R; ++i)
	{
		cnt += (i % d == 0) ? 1 : 0;
	}
	
	std::cout << cnt / d << std::endl;
	return 0;
}