题解 | #四舍五入#

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        System.out.println(n % 10 >= 5 ? n + (10 - (n % 10)) : n / 10 * 10);
    }
}