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谁帮我看下哪错了

Posted by prolovec at 2009-04-06 20:44:27 on Problem 1011
In Reply To:请问有人能够将64的那组BT数据控制在1S之内么? Posted by:zentropy at 2007-09-02 16:03:34
所有数据都能通过,C++提交的时候一直出现RE错误,要崩溃了
#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<functional>
using namespace std;
bool search(int length,int p);
bool find(int l);
int wood[100],sol[200];//记录木棒信息,已用的木棒信息
bool use[100];//记录使用情况
int sum,key,n;//砍断后的木棒长度和,当前正在用的木棒,木棒总数
int main()
{
	int i,total;
	while (scanf("%d", &n) == 1, n)
	{
		memset(wood,0,sizeof(wood));
		memset(sol,0,sizeof(sol));
		memset(use,false,sizeof(use));
		total=n;
		sum=0;
		for(i=0;i<total;i++)
		{
		scanf("%d",wood+i);
		sum+=wood[i];
		}
		sort(wood,wood+total,greater<int>());//剪枝:将木棒长度从大到小排
		if(sum%wood[0]==0&&find(wood[0]))
		{
			printf("%d\n",wood[0]);
		}
		else{
			total/=2;//剪枝:因最长的木棒不合要求,故每根木棍至少由两根木棒合成
			do{
				while(sum/total<=wood[0])total--;
				if(sum%total==0)
				{
					memset(use,false,sizeof(use));
					if(find(sum/total)){printf("%d\n",sum/total);break;}
				}
				if(sum%2&&total==2){printf("%d\n",sum);break;}//剪枝:作用好像不太明显
			}while(--total);		
		}
	}
return 0;
}
bool find(int l)//验证该长度是否符合要求
{
	int p,length,number;//当前指向的木棒,还缺的长度,应合成的数量
	length=l;
	number=sum/l;
	key=1;
	sol[0]=-1;
	p=0;
	while(--number)//剪枝:最后一根木棒不必验证
	{
	
		if(search(length,p))
		{
			sol[key++]=-1;
			length=l;
			p=0;
		}
		else{
			number+=2;
			key--;
			
			p=sol[key]+1;
			length=wood[sol[key]];
			use[sol[key]]=false;
			sol[key]=0;
			if(number>sum/l||key<=1)return false;
			}
	}
	return true;
}
bool search(int length,int p)
{
	int i=p;
	while(length)
	{	
		while(wood[i]>length||use[i]||i==n)//找到比剩余长度小且未被使用过的木棒
		{
			if(i==n)
			{
				key--;
				length+=wood[sol[key]];
				use[sol[key]]=false;			
				i=sol[key];
				sol[key]=0;
				while(wood[i]==wood[i+1])i++;
				//剪枝:因该长度不合要求,故找下一根不同长度的木棒(很重要)
	if(sol[key-1]==-1){sol[--key]=0;return false;}
			}
			i++;
		}
		length-=wood[i];
		use[i]=true;
		sol[key++]=i;
		i++;
	}

	return true;
}

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