import java.text.DecimalFormat;
import java.util.*;
public class yuceshengao {/*** @param args* 试题 算法训练 预测身高* 你能看见你未来的样子吗？显然不能。但你能预测自己成年后的身高，有公式：* 男孩成人后身高=（父亲身高+母亲身高）/2*1.08* 女孩成人后身高=(父亲身高*0.923+母亲身高）/2*/public static void main(String[] args) {// TODO Auto-generated method stubScanner sc = new Scanner(System.in);int sex = sc.nextInt(); //性别double height_father = sc.nextDouble(); //父亲身高double height_mother = sc.nextDouble(); //母亲身高DecimalFormat df = new DecimalFormat("0.000");String result = df.format((float)5/6);if (sex==0) {//女孩result = df.format((float)(height_father*0.923+height_mother)/2);}else {//男孩result = df.format((float)(height_father+height_mother)/2*1.08);}System.out.println(result);}}