大象看朋友

An elephant decided to visit his friend. It turned out that the elephant’s house is located at point 0 and his friend’s house is located at point x(x > 0) of the coordinate line. In one step the elephant can move 1, 2, 3, 4 or 5 positions forward. Determine, what is the minimum number of steps he need to make in order to get to his friend’s house.

Input
The first line of the input contains an integer x (1 ≤ x ≤ 1 000 000) — The coordinate of the friend’s house.

Output
Print the minimum number of steps that elephant needs to make to get from point 0 to point x.

Examples
Input
5
Output
1
Input
12
Output
3
Note
In the first sample the elephant needs to make one step of length 5 to reach the point x.

In the second sample the elephant can get to point x if he moves by 3, 5 and 4. There are other ways to get the optimal answer but the elephant cannot reach x in less than three moves.
题目大意：大象可以向前移动1，2，3，4或5个位置。确定，他到达朋友家所需的最低步骤是多少？大象的位置为0；朋友的为x（用户输入）。
代码如下（已AC）

#include<iostream>
using namespace std;
int main()
{
	int n;
	cin >> n;
	int m;
	if (n % 5 == 0)
		m = n / 5;
	else
		m = n / 5 + 1;
	cout << m;
	return 0;
}