UVa 10347 - Medians

10347 - Medians

 * http://acm.uva.es/p/v103/10347.html

Summary
Given the lenghts of all three medians in a triangle, compute that triangle's area.

Explanation
All you need to know is the correct formula, that's it. You may check out this.

Input
3 3 3

Output
5.196