PAT1008

最近英语水平突飞猛进

https://pintia.cn/problem-sets/994805342720868352/problems/994805511923286016

#include<cstdio>


int num[10005];
int flag[101];
int N;

int main()
{

    scanf("%d",&N);
    num[0] = 0;
    flag[0] = 1;
    int j =1;
    for(int i = 0;i < N;i++)
    {
        int t;
        scanf("%d",&t);
        num[j] = t;
        j++;
        flag[t] = 1;
    }
    int sum = 0;
    for(int i = 0;i < j-1;i++)
    {
        int t = num[i+1] - num[i];
        if(t > 0) sum += 6*t+5;
        else if(t < 0) sum += 4*(-t)+5;
        else sum += 5;
    }
    printf("%d\n",sum);



    return 0;
}