Grokking the Coding Interview: Patterns for Coding Questions

Solution: Smallest Number Range

## Problem Statement

Given ‘M’ sorted arrays, find the smallest range that includes at least one number from each of the ‘M’ lists.

**Example 1**:
```
Input: L1=[1, 5, 8], L2=[4, 12], L3=[7, 8, 10]
Output: [4, 7]
Explanation: The range [4, 7] includes 5 from L1, 4 from L2 and 7 from L3.
```
**Example 2**:
```
Input: L1=[1, 9], L2=[4, 12], L3=[7, 10, 16]
Output: [9, 12]
Explanation: The range [9, 12] includes 9 from L1, 12 from L2 and 10 from L3
```

## Solution

This problem follows the **K-way merge pattern** and we can follow a similar approach as discussed in `Merge K Sorted Lists`.