Given a set of intervals in an array, write a pseudocode function that print all non-overlapping intervals after merging the overlapping intervals.

Note: Input example 1: a[0] = (1,3), a[1] = (2,4), your function should print '(1,4)' Input example 2: a[0] = (1,3), a[1] = (3,5), your function should print '(1,3), (3,5)'（代表兩區間只在端點相接、不算重疊，不合併）