Computer Programming Contest Preparation

    1 12.34e45E45 is illegal.
    2 1.2 is legal.
    3  is illegal.
    4 100 is illegal.
    5 100.4e34.8 is illegal.
    6 1.2e+45 is legal.
    7 1.2e+4      5 is illegal.
    8 ++56.90 is illegal.
    9 +0.00 is legal.
   10 *45 is illegal.