C :

int main(int argc, char* argv[])
{int N,sum,i,a[101];
	while(~scanf("%d",&N))
{if(N==0)break;
for(i=0;i<N;i++){scanf("%d",&a[i]);}
sum=a[0]*5+10*N;
for(i=0;i<N-1;i++){if(a[i]<a[i+1])sum=sum+(a[i+1]-a[i])*5;else sum=sum+(a[i]-a[i+1])*4;}
printf("%d\n",sum);
	}
	return 0;
}

C++ :

#include<stdio.h>
int main()
{
	int i,sum,n;
	int a[100];
	while(scanf("%d",&n)!=EOF)
	{
		if(n==0)
			break;
		sum=0;
		for(i=0;i<n;i++)
			scanf("%d",&a[i]);
		sum+=10*n;
		for(i=0;i<n;i++)
		{
			if(i==0)
				sum+=a[i]*5;
			else if(a[i]>a[i-1])
				sum+=(a[i]-a[i-1])*5;
			else sum+=(a[i-1]-a[i])*4;
		}
		printf("%d\n",sum);
	}
	return 0;
}