Problem Definition
Details about this problem is available here. Required Background Topic: Cyclic quadrilateral.
Solution
Given that the length of the sides are {a,b,c,d}, the Maximal Quadrilateral Area is given
Problem Definition
Frank explained its friend Felman the algorithm of Euclides to calculate the GCD of two numbers. Then Felman implements it algorithm int gcd(int a, int b) { if (b==0) return
Problem Definition
The Antique Comedians of Malidinesia prefer comedies to tragedies. Unfortunately, most of the ancient plays are tragedies. Therefore the dramatic advisor of ACM has decided to transfigure some tragedies into comedies.