Unique For a sequence of integers A={a0,a1,...,an−1} which is sorted by ascending order, eliminate all equivalent elements.

A sequence is given in the following format.

n 

a0 a1,...,an−1

Print the sequence after eliminating equivalent elements in a line. Separate adjacency elements by a space character.

4
1 2 2 4

1 2 4

1≤n≤100,000 

−1000,000,000≤ai≤1,000,000,000 

a0≤a1≤...≤an−1