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Re:咋错了?错哭了!

Posted by acm_bug at 2006-10-03 11:58:25 on Problem 2549
In Reply To:咋错了?错哭了! Posted by:acm_bug at 2006-10-03 11:55:58
> #include<iostream>
> #include<math.h>
> #include<algorithm>
> using namespace std;
> long a[1001];
> int main()
> {
>     int n;
>     while(cin>>n&&n)
>     {
>                  for(int i=0;i<n;++i)
>                  cin>>a[i];
>                  sort(a,a+n);
>                  bool t=0;
>                  for(int i=n-1;i>=3;--i)
>                  {
>                     for(int j=i-1;j>=2;--j)
>                     {
>                        if((a[i]-a[j])<a[0])continue;
>                        for(int k=0;k<=j-2;++k)
>                        {
>                           
>                           if(!binary_search(a+k+1,a+j,(a[i]-a[j]-a[k])))continue;
>                           cout<<a[i]<<endl;t=1;break;//加个这个忘记了,还是不行
>                        }
>                        if(t)break;
>                        
>                     }
>                     if(t)break;
>                  }
>                  if(!t)cout<<"no solution"<<endl;
>                  
>     
>     }
>     return 0;
> }
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 

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