## BlueBook - Triangle

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Points: 3
Time limit: 1.0s
Memory limit: 16M

Problem types
##### BlueBook

Given an integer , output the first rows of Pascal's triangle.

#### Input Specification

A single integer .

#### Output Specification

The first rows of Pascal's triangle, in order from top to bottom. Each row should be printed in a separate line, and the entries in each row should be printed from left to right with exactly one space between each pair of horizontally adjacent entries.

#### Sample Input

3

#### Sample Output

1
1 1
1 2 1