SP25942 BALLSUM - Ball sum

You have a bag filled with N balls.Each Ball has a distinct number from 1 to N printed on it.All the numbers are distinct. You withdraw two balls from the bag and take their sum. You need to calculate the probability that the sum is not greater than the given number K(

Input consists of various test cases. Each test case consist of two integer inputs,N and K. (0

Output the result in the form of p/q.(Except when the answer is 0 or 1)