ZZULIOJ 1121: 电梯，Java

1121: 电梯

import java.util.Scanner;
public class Main {
    
    
    static int []a = new int[1010];
    public static void main(String[] args) {
    
    
        Scanner cin = new Scanner(System.in);
        int n=cin.nextInt();
        for(int i=1;i<=n;i++) a[i]=cin.nextInt();
        a[0]=0;int s=0;
        for(int i=1;i<=n;i++)
        {
    
    
            if(a[i]>a[i-1]) s+=(a[i]-a[i-1])*6+5;
            else s+=(a[i-1]-a[i])*4+5;
        }
        System.out.println(s);
    }
}