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G++WA,C++TLE,ft??????????????????????????????????????????????

Posted by ecjtubaowp at 2007-05-21 22:28:56 on Problem 2597
In Reply To:why wa呀 Posted by:ecjtubaowp at 2007-05-21 18:13:03
> #include<stdio.h>
> #include<stdlib.h>
> #include<string.h>
> int b[82][82];
> int bn[82][82],n;
> struct Node
> {
>  int x;
>  int y;
> }node[82];
> int fun(const void*a,const void*b)
> {
>  Node p,q;
>  p=*(Node*)a,q=*(Node*)b;
>  if(p.y!=q.y)return p.y-q.y;
>  return p.x-q.x;
> }
> int find(int l)
> {
>     int i,j,k,p,sum=0;
>     for(i=0;i<l-1;i++)
>     {
>         memset(bn,0,sizeof(bn));
>         for(j=0;j<n;j++)
>         {
>             for(k=0;k<n;k++)
>             {
>                 for(p=0;p<n;p++)
>                   bn[j][k]+=b[j][p]*b[p][k];
>             }    
>         }    
>         for(j=0;j<n;j++)
>         for(k=0;k<n;k++)
>         b[j][k]=bn[j][k];
>     }    
>     for(i=0;i<n;i++)
>       for(j=0;j<n;j++)
>         sum+=b[i][j];   
>     return sum;
> }    
> 
> int main()
> {
>  int i,j,k,m,max,t,ans,count;
>  while(scanf("%d",&n)!=EOF)
>  {memset(b,0,sizeof(b));
>   for(i=0;i<n;i++)
>   {
>    scanf("%d%d",&node[i].x,&node[i].y);
>    if(node[i].x>node[i].y)
>    {
>    t=node[i].x,node[i].x=node[i].y,node[i].y=t;
>    }
>   }
>   qsort(node,n,sizeof(node[0]),fun);
>   for(i=0;i<n;i++)
>   printf("%d %d\n",node[i].x,node[i].y);
>   ans=1;t=node[0].y;
>   for(i=1;i<n;i++)
>   {
>    if(node[i].x>=t)
>    {
>     ans++,t=node[i].y;
>    }
>   }
>   for(i=0;i<n;i++)
>           for(j=0;j<n;j++)
>             if(node[i].y<=node[j].x)b[i][j]=1;   
> 
>   max=n-ans;//ans为不相交的总数 
>   count=ans-1;
>   ans=find(count);
>   if(max==0)printf("0 1\n");
>   else printf("%d %d\n",max,ans);
>  }
> }

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