1008 Elevator (20point(s))

简单模拟。

#include<cstdio>
using namespace std;

int main(void) {
//    freopen("in.txt","r",stdin);
    int N;
    scanf("%d",&N);
    int last=0,curr;
    long long ans=0;
    while(N--){
        scanf("%d",&curr);
        if(curr>last) ans+=6*(curr-last);
        else if(curr<last) ans+=4*(last-curr);
        ans+=5;
        last=curr;
    }
    printf("%lld\n",ans);
    return 0;
}

/*
Sample Input:
3 2 3 1

Sample Output:
41
*/