题解 | #取近似值#

import java.io.*;

// 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) {
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        try {
            String s = br.readLine();
            String[] split = s.split("\\.");

            String s1 = s.replaceFirst(split[0], "0");
            Double num = Double.valueOf(s1);
            String s2;
            if(num<0.5){
                s2=String.valueOf(split[0]);
                System.out.println(s2);
            }else{
                s2=String.valueOf(Long.valueOf(split[0])+1);
                System.out.println(s2);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}