Algorithm of 11479 - Is this the easiest problem

Problem Description Link

Algorithm:

This is a geometric problem . you  can solve this problem easily . you can follow this stapes

       1.       At first you need three value for three sides (ie. a, b, c)

          N.B.: three sides can formed a triangle if and only if third side is greater than summation of  

             other two side   . where third side is largest value among three sides value .

             (i.e.:  5, 9, 6 where third side is 9).

 2.            if possible formed a triangle then you need to check

                ·  Equilateral  - All three sides of valid triangle are equal

·  Isosceles  - Exactly two of the sides of a valid triangle are equal.

·              Scalene - No pair of sides are equal in a valid triangle. 

            3. Otherwise

·  Invalid - The three sides can not form a triangle

     (N.B: you can use long long int for data type)