package controller;
import java.util.Scanner;
public class Test1 {
public static void main(String[] args) {
int speed = 4;
int speed_20= 2;
int speed_40 =1 ;
int sum = 0;
Scanner sc = new Scanner(System.in);
System.out.println("請輸入秒數");
int x = sc.nextInt();
for (int i = 0; i < x; i++) {
if(x <= 5){
sum = speed * x;
}else if(x <= 15 && x > 5){
sum = speed * 5 + (speed-speed_20)*(x-5);
}else if(x>15&&x<25){
sum = speed * 5 + (speed-speed_20)*(15-5)+(speed-speed_20-speed_40)*(25-15);
}else{
sum = 50;
}
}
System.out.println("x秒後水深為："+sum+"cm");
}
}