Largest Rectangle problem

[subhroacharjee]

Is your feature request related to a problem? Please describe.
One of the most interesting problem, is largest rectangle problem, which basically finds the largest rectangle in a array of histogram.

Describe the solution you'd like

• The brute force solution is on order of n square and can be solved using 2 for loops
• The optimized way of solving is to use stacks

Describe alternatives you've considered

Additional context
Problem figure

[subhroacharjee]

@siriak can you assign me to this

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