题解 | #取近似值#

import java.util.Scanner;

// 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 sc = new Scanner(System.in);
        String s = sc.nextLine();
        int index = s.indexOf(".");
        String s1 = s.substring(0, index);
        String s2 = s.substring(index + 1, s.length());
        Double s3 = Double.valueOf(Integer.parseInt(s2));
        for (int i = 0; i < s2.length(); i++) {
            s3 *= 0.1;
        }
        if (s3 >= 0.5) {
            System.out.println(Integer.parseInt(s1) + 1);
        } else {
            System.out.println(Integer.parseInt(s1));
        }
    }
}