uva - 496 - Simply Subsets

#include <iostream>
#include <sstream>

using namespace std;

int main()
{
    istringstream sin;
    string s;
    while(getline(cin,s))
    {
        sin.str(s);
        int a[1000]={0},b[1000]={0};
        int i=0,j=0;
        while(sin >> a[i])
        {
            bool bb=false;
            for(int p=0;p<i;p++)
                if(a[i]==a[p])
                {
                    bb=true;
                    break;
                }
            if(bb==true)
                continue;
            i++;
        }
        for(int p=0;p<i;p++)
        {
            for(int q=p+1;q<i;q++)
            {
                if(a[p]>a[q])
                     a[p]^=a[q]^=a[p]^=a[q];
            }
        }
        sin.clear();
        getline(cin,s);
        sin.str(s);
        while(sin >> b[j])
        {
            bool bb=false;
            for(int p=0;p<j;p++)
                if(b[j]==b[p])
                {
                    bb=true;
                    break;
                }
            if(bb==true)
                continue;
            j++;
        }
        sin.clear();
        for(int p=0;p<j;p++)
        {
            for(int q=p+1;q<j;q++)
            {
                if(b[p]>b[q])
                     b[p]^=b[q]^=b[p]^=b[q];
            }
        }
        int m=0,n=0;
        int both=0;
        while(m<i&&n<j)
        {
            if(a[m]==b[n])
            {
                m++;n++;
                both++;
                continue;
            }
            else if(a[m]<b[n])
                m++;
            else
                n++;
        }
        if(both>0)
        {
        if(both==i&&both==j)
        {
            cout << "A equals B" << endl;
            continue;
        }
        else if(both==i&&both<j)
        {
            cout << "A is a proper subset of B" << endl;
            continue;
        }
        else if(both<i&&both==j)
        {
            cout << "B is a proper subset of A" << endl;
            continue;
        }
        else if(both<i&&both<j)
        {
            cout << "I'm confused!" << endl;
            continue;
        }
        }
        else if(both==0)
        {
            if(i>0&&j>0)
            {
                cout << "A and B are disjoint" << endl;
                continue;
            }
            else if(i==0&&j>0)
            {
                cout << "A is a proper subset of B" << endl;
                continue;
            }
            else if(j==0&&i>0)
            {
                cout << "B is a proper subset of A" << endl;
                continue;
            }
            else
            {
                cout << "A equals B" << endl;
                continue;
            }
        }
    }
}