PAT 1008

#include<cstdio>#include<iostream>#include<string>#include<string.h>#include<algorithm>#include<queue>#include<map>#include<set>using namespace std;int main(){//freopen("input.txt","r",stdin);int n;cin>>n;int a[100100];a[0]=0;for(int i=1;i<=n;i++){cin>>a[i];}int sum=0;for(int i=1;i<=n;i++){if(a[i]>=a[i-1])sum+=(a[i]-a[i-1])*6+5;elsesum+=(a[i-1]-a[i])*4+5;}printf("%d",sum);//freopen("con","r",stdin);system("pause");return 0;}