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# include <iostream>
using namespace std;
int main(){
int a[100]={0};
int n;
int i;
int sum=0;
cin>>n;
sum=n*5;
for (i=1;i<=n;i++){
cin>>a[i];
}
for (i=1;i<=n;i++){
if(a[i]>a[i-1])
sum+=6*(a[i]-a[i-1]);
else
sum+=4*(a[i-1]-a[i]);
}
cout<<sum<<endl;
return 0;
}
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原文地址:http://www.cnblogs.com/guangluwutu/p/4389984.html