720. Pascal's Triangle
0
Easy
Given an integer N, the task is to generate the first N rows of Pascal's triangle.
Pascal's triangle is a triangular array of numbers where each number is the sum of the two numbers directly above it.
Input Format
The input consists of a single integer N on a separate line.
Output Format
Print N rows of Pascal's triangle, each row separated by a new line.
Example
Input
4
Output
1
1 1
1 2 1
1 3 3 1
Constraints
0 <= N <= 30
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