題目：停車費計算
說明：計算出停車時間後，依據題目設定算出最後需支付的停車費用

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int min1 = sc.nextInt();
		int s1 = sc.nextInt();
		int min2 = sc.nextInt();
		int s2 = sc.nextInt();
		int time1 = min1 * 60 + s1;
		int time2 = min2 * 60 + s2;
		int result = 0;
		int time = time2 - time1;
		if(time < 120 && time > 0) {
			result = (time) / 30 * 30; 
		}else if(time <= 240 && time >= 120){
			result = (time-120) / 30 * 40 + 120; 
		}else{
			result = (time-240) / 30 * 60 +120 +160; 
		}
		System.out.println(result);
	}

}