if (x1 < y1)
   return 1;
else if (x1 == y1)) {
    if (x2 < y2)
        return 1;
    else if (x2 == y2) {
        if (x3 < y3)
            return 1;
    } else
          return 0;
    }
} else
   return 0;

if (x1 < y1 || (x1 == y1 && x2 < y2) || (x1 == y1 && x2 == y2 && x3 < y3))
    return 1;
else
    return 0;

A + (A1 * B) + (A1 * B1 * C)