UVa 494

#include<bits/stdc++.h>

using namespace std;

int main()
{
 string l,ll;

 while(getline(cin,l) && getline(cin,ll))
 {
  
  set<string>s1,s2;
  string num;
  istringstream str1(l.c_str());

  while(str1>>num)
  {
   s1.insert(num);
  }

  istringstream str2(ll.c_str());

  while(str2>>num)
  {
   s2.insert(num);
  }

  set<string>:: iterator it,ix;

  int ab=0;

  for(it=s1.begin(); it !=s1.end(); it++)
  {
   ix=s2.find(*it);
   if(ix!=s2.end()) ab++;
  }

  int ba=0;

  for(it=s2.begin(); it!=s2.end(); it++)
  {
   ix=s1.find(*it);
   if(ix!=s1.end()) ba++;
  }

   if(ab==0 && ba==0)  cout<<"A and B are disjoint"<<endl;
    else if(ab==ba && (ab==s1.size() && ba==s2.size()))  cout << "A equals B" << endl;
     else if(ab==s1.size() && (s1.size()<s2.size()))  cout << "A is a proper subset of B" << endl;
      else if(ba==s2.size() && (s2.size()<s1.size()))  cout << "B is a proper subset of A" << endl;
       else cout << "I'm confused!" << endl; 

 }

 return 0;
}