UVa/10469 - To carry or not to carry/10469.2.cpp

   1 #include <stdio.h>
   2
   3 int main(){
   4   unsigned int x,y;
   5   while (scanf("%u %u", &x, &y) == 2){
   6     printf("%u\n", x ^ y);
   7   }
   8   return 0;
   9 }