Computer Programming Contest Preparation

    1 Case 1: Equilateral
    2 Case 2: Invalid
    3 Case 3: Invalid
    4 Case 4: Isosceles
    5 Case 5: Scalene
    6 Case 6: Invalid
    7 Case 7: Invalid
    8 Case 8: Isosceles
    9 Case 9: Isosceles
   10 Case 10: Scalene
   11 Case 11: Scalene
   12 Case 12: Scalene