Write a program that takes a number **n** (1 ≤ n ≤ 100) and prints a Christmas tree with height of **n+1**.

Write a program that gets a positive integer n and prints on the console a rectangle made out of N x N stars.

Abstract: In the WZ factorization the outermost parallel loop decreases the number of iterations executed at each step and this changes the amount of parallelism in each step. The aim of the paper is ...