Untitled

#include <iostream>
using namespace std;
int main()
{
    int a,b=0;
    cin >> a;
    while (a >= 5) {
        a -= 5;
        b++;
    }
    while (a >= 4) {
        a -= 4;
        b++;
    }
    while (a >= 3) {
        a -= 3;
        b++;
    }
    while (a >= 2) {
        a -= 2;
        b++;
    }
    while (a >= 1) {
        a -= 1;
        b++;
    }
    cout << b;
}