Easy
Quiz
#118 Pascal's Triangle
APPROACH
Given an integer numRows, generate and return the first numRows rows of Pascal's triangle.
In Pascal's triangle, every interior number equals the sum of the two numbers directly above it.
Example 1:
Input: numRows = 5
Output: [[1],[1,1],[1,2,1],[1,3,3,1],[1,4,6,4,1]]
Example 2:
Input: numRows = 1
Output: [[1]]
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