UVa/10469 - To carry or not to carry/10469.cpp

   1 #include <iostream>
   2
   3 using namespace std;
   4
   5 int main(){
   6   unsigned long x,y;
   7   while (cin >> x >> y){
   8     cout << (x ^ y) << endl;
   9   }
  10   return 0;
  11 }