geguojun 的专栏

Problem A: Fractions Again?! Time limit: 1 second It is easy to see that for every fraction in the form  (k > 0), we can always find two positive integers x and y, x ≥ y, such

DescriptionAC  Problem D - Maximum Product Time Limit: 1 second Given a sequence of integers S = {S1, S2, ..., Sn}, you should determine what is the value of the maximum positive product