## Facebook hacker cup: Power Overwhelming

You are to inflict maximum damage to the zerg army. There are two types of units - Warrior and Shield. Warriors do damage every second, while a shield protects your entire army for one second.…

## Facebook hacker cup: Geometric approach to double squares problem

Given an integer $$N$$, we need to find the number of integral pairs $$(x, y) \mid x^2 + y^2 = N$$, $$N \in [0, 2147483647]$$, with a maximum of 100 such numbers in a file.…