solocaptai...：sort(data.begin(),data.end()); if(n==r)     cout<<data[n/2]<<endl; else if(n&1)     cout<<data[n/2+(n-r+1)/2]<<endl; else     cout<<data[n/2+(n-r)/2]<<endl; 就随便乱写一通，居然过了70.。。笑了