Interview Course Based on Story Questions

# Problem statement

Given an `m x n` integer matrix and a target value, determine if the target exists in the matrix or not.


>The matrix has the following properties:
>
>- Integers in each row are sorted from left to right.
>
>- The first integer of each row is greater than the last integer of the previous row.

## Input

The input will be an `m x n` matrix of integers and a `target` integer value. The following is an example input:


```python
matrix = [[1,3,5,7],[10,11,16,20],[23,30,34,60]]

target = 30
```

## Output

The output will be a Boolean value. The following is an example output for the above input:


```python
True
```

The number `30` is present in the `m x n` matrix.

# Coding exercise

Implement the `search_matrix(matrix, target)` function, where `matrix` is the `m x n` matrix of integers and `target` is the value that needs to be searched. The function will return a single Boolean value representing whether `target` exists in `matrix` or not.

DIY: Searching a 2D Matrix

Problem statement