기록하는 개발자

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int N = in.nextInt(); if (N == 4 || N == 7) System.out.println(-1); else if (N % 5 == 0) System.out.println(N / 5); else if (N % 5 == 1 || N % 5 == 3) System.out.println((N / 5) + 1); else if (N % 5 == 2 || N % 5 == 4) System.out.println((N / 5) + 2); } }