CCF|打酱油|Java

import java.util.Scanner;

public class Main

{

public static void main(String[] args)

{

Scanner in = new Scanner(System.in);

int n = in.nextInt();

int k=n/10;

    int i=k/5*2;

    int j=(k-(k/5)*5)/3;
    System.out.println(k+i+j);

}

}