题解 | #取近似值#

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
        double nextDouble = in.nextDouble();
        double i = 1;
         double v =  Math.floor(nextDouble);

        if ((nextDouble - v) >= 0.5) {
            v = v+1;
        }

        System.out.println((v+"").substring(0,(v+"").length()-2));
    }
}