pat甲级打卡-1008 Elevator

简单题

#include<bits/stdc++.h>
using namespace std;

int n,cnt;
int main(){
    cin>>n;
    int pre=0;
    while(n--){
        int tmp;
        cin>>tmp;
        if(tmp>pre) cnt+=(tmp-pre)*6;
        else cnt+=(pre-tmp)*4;
        cnt+=5;
        pre=tmp;
    }
    cout<<cnt;
    return 0;
}