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这个是随机乱搞,不只是随机In Reply To:不知道随机化是不是这么做,老WA啊!!! Posted by:IamI at 2005-08-06 15:42:00 > #include<iostream.h>
> #include<stdlib.h>
>
> void main(){
> int i,j,n,n2,time,a[20],t[20][20];
> long sum,max;
>
> cin>>n; max=-1; n2=(n+1)/2;
> for(i=0;i<n;i++)
> for(j=0;j<n;j++)
> cin>>t[i][j];
>
> time=200000;
>
> while(time--){
> sum=0;
>
> for(i=0;i<n;i++) a[i]=0;
>
> for(i=0;i<n2;i++) a[rand()%n]=1;
>
> for(i=0;i<n;i++)
> for(j=0;j<n;j++)
> if( (a[i]) && (!a[j]) ) sum+=t[i][j];
>
> if(sum>max) max=sum;
> }
>
> cout<<max<<endl;
> }
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