Anold Stone Game~~GarsiaWachsアルゴリズム

/*******************
author:YKY
email:[email protected]
language:c++
problem:GarsiaWachs
*******************/ 
#include<iostream> 
#include<stdio.h>
#define maxx 50000
using namespace std;

int stone[maxx],n,t;
int ret;

void combine(int k)
{
	int tmp=stone[k]+stone[k-1];
	ret+=tmp;
	for(int i=k;i<t-1;i++)
		stone[i]=stone[i+1];
	t--;
	int j;
	for(j=k-1;j>0 && stone[j-1]<tmp;j--)
		stone[j]=stone[j-1];
	stone[j]=tmp;
	while(j>=2 && stone[j]>=stone[j-2]){
		int d=t-j;
		combine(j-1);
		j=t-d;
	} 
}
int main()
{
	while(scanf("%d",&n),n){
		for(int i=0;i<n;i++)
			scanf("%d",&stone[i]);
		t=1,ret=0;
		for(int i=1;i<n;i++){
			stone[t++]=stone[i];
			while(t>=3 && stone[t-3]<=stone[t-1])
					combine(t-2);
		}
	
	while(t>1) combine(t-1);
	printf("%d
",ret);
	}
	return 0; 
}