1259 - Goldbach`s Conjecture

Every even integer, greater than 2, can be expressed as the sum of two primes [1].Goldbach's conjecture is one of the oldest unsolved problems in number theory and in all of mathematics. It states:

Now your task is to >>继续阅读

1197 - Help Hanzo

Before reaching Amakusa's castle, Hanzo has to pass some territories. The territories are numbered as a, a+1, a+2, a+3 ... b. But not all the territories are safe for Hanzo because there can be other fighters waiting for him. Actu >>继续阅读