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118\. Pascal's Triangle

Easy

Given an integer `numRows`, return the first numRows of **Pascal's triangle**.

In **Pascal's triangle**, each number is the sum of the two numbers directly above it as shown:

![](https://upload.wikimedia.org/wikipedia/commons/0/0d/PascalTriangleAnimated2.gif)

**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]] 

**Constraints:**

*   `1 <= numRows <= 30`




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