题解 | #四舍五入#

import java.util.Scanner;
import java.math.BigDecimal;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();

        //write your code here......
        BigDecimal bd = new BigDecimal(d);
        BigDecimal i = bd.setScale(0, BigDecimal.ROUND_HALF_UP);


       // System.out.println(i);

        System.out.println(i);
    }
}