<commit_before>## Lesson 4 (Stacks and Queues) in [Codility](https://codility.com/programmers/lessons/5)

### Tasks

#### Nesting
Determine whether given string of parentheses is properly nested.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/Nesting.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/Nesting.php)

#### StoneWall
Cover "Manhattan skyline" using the minimum number of rectangles.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/StoneWall.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/StoneWall.php)

#### Brackets
Determine whether a given string of parentheses is properly nested.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/Brackets.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/Brackets.php)

#### Fish
N voracious fish are moving along a river. Calculate how many fish are alive.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/Fish.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson04/Fish.php)
<commit_msg>Lesson05 Updated<commit_after>## Lesson 4 (Stacks and Queues) in [Codility](https://codility.com/programmers/lessons/5)

### Tasks

#### Nesting
Determine whether given string of parentheses is properly nested.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/Nesting.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/Nesting.php)

#### StoneWall
Cover "Manhattan skyline" using the minimum number of rectangles.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/StoneWall.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/StoneWall.php)

#### Brackets
Determine whether a given string of parentheses is properly nested.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/Brackets.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/Brackets.php)

#### Fish
N voracious fish are moving along a river. Calculate how many fish are alive.
* [Problem Statement](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/Fish.md)
* [Solution Code](https://github.com/samiulhoque/codility-lessons/blob/master/src/Lesson05/Fish.php)

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