int main(){
int r1, r2;
r1 = 0; r2 = 0;
printf("0, 0 answer %i\n", r1 || (r2 ? 0 : 1));
r1 = 0; r2 = 1;
printf("0, 1 answer %i\n", r1 || (r2 ? 0 : 1));
r1 = 1; r2 = 0;
printf("1, 0 answer %i\n", r1 || (r2 ? 0 : 1));
r1 = 1; r2 = 1;
printf("1, 1 answer %i\n", r1 || (r2 ? 0 : 1));
return 0;
}