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/*

SUM=10

SUM=10+(8-3)*2 = 20

SUM=34+(20-15)*3 = 49*

*/

import java.util.Scanner;

public class Test19 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int sum=10;
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入车行驶的距离：");
		while(true) {
		int k= sc.nextInt();
			if(k == 0) {
				System.out.println("程序退出，欢迎下次使用");
				break;
			}else if(k<=3) {
					sum=10;
			}else if(k<=15) {
				sum=10+(k-3)*2 ;
			}
			else if(k>15) {
				sum=34+(k-15)*3;
			}
			
			System.out.println("需要支付的费用为："+sum);
		}
	}
}