题解 | #求解立方根#

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);
        double max = 100;
        double n = sc.nextDouble();
        boolean negative = false;
        if (n < 0) {
            n = -n;
            negative = true;
        }
        int flag;
        double tar = 0;
        if (n <= 1) {
            for (double i = 0.1; i <= 1; i += 0.1) {
                double res = i * i * i;
                double distance = n - res;
                distance = distance > 0 ? distance : -distance;
                if (distance < max) {
                    max = distance;
                    tar = i;
                }
            }
        } else {
            for (double i = 0.1; i < n; i += 0.1) {
                double res = i * i * i;
                double distance = n - res;
                distance = distance > 0 ? distance : -distance;
                if (distance < max) {
                    max = distance;
                    tar = i;
                    flag = 1;
                } else {
                    flag = 0;
                }
                if (flag == 0) {
                    break;
                }
            }
        }
        if (negative) {
            System.out.printf("%.1f\n", -tar);

        } else {
            System.out.printf("%.1f\n", tar);
        }
    }
}