Pat#1008

pat1008.java

import java.util.Scanner;


public class Main {
  
	static int sumTime(int[] arr, int upcost, int downcost, int stopcost){
		int up=arr[0], down=0, stop=arr.length;
		for(int i=1; i<arr.length; i++){
			int diff = arr[i] -arr[i-1];
			if(diff>0)
				up += diff;
			else
				down -= diff;
		}
		return up*upcost + down*downcost + stop*stopcost;
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] arr = new int[N];
		for(int i=0; i<N; i++)
			arr[i] = sc.nextInt();
		System.out.println(sumTime(arr, 6,4,5));
	}

}