July 12 - ADA Training
You are given n rods of length 1, 2, . . . , n. You have to pick any 3 of them and build a triangle. How many distinct triangles can you make? Note that, two triangles will be considered different if they have at least 1 pair of arms with different length.
Each line has one positive integer n (3 ≤ n ≤
106). The end of input will be indicated by a case with n < 3. This case should not be processed.
For each test case, print the number of distinct triangles you can make.
5 8 0