不知道是我誤解題目還是?

WA:line 2 我的答案是:  

               正確答案:1 2 4 8 16

請各位撥點時間指導我一下 感謝

#include <iostream>
using namespace std;
int main()
{
    int a,b,c,d,e,t;
    while(cin >> t)
    {
    while(t--)
      {
      cin >>a>>b>>c>>d;
    if(a<100001 && b<100001 && c< 100001 && d<100001)
        {
        if((d-c) == (b-a))
          {
                 e=d+(b-a);
                        if(e<100001)
                  {
                        cout << a<< " "<< b<< " "<< c<< " "<< d<< " "<< e << endl;
                  }
                        else
                  {
                        cout <<" "<<endl;
                  }
          }
        if( (b/a) == (d/c) )
          {
                e=d*(d/c);
                        if(e<100001)
                    {
                        cout << a<< " "<< b<< " "<< c<< " "<< d<< " "<< e << endl;
                    }
                        else
                    {
                        cout<< " "<< endl;
                    }
          }
       else
       {cout<< " "<<endl;}
        }
       }
    }
}