Add: puzzle.c in C directory

[mayurjethwa]

Added 15 puzzle program in c language using branch & bound algorithm.

[axrav]

@mayyyur Thanks for your contribution, But I personally believe this is not the correct way to add puzzle, can you just give a simple puzzle rather with proper output as comments

[mayurjethwa]

@axrav Actually this is the puzzle problem which states a initial state and a goal state . you can refer

• ( https://www.youtube.com/watch?v=l6bqjCDK3Kg ).
• ( https://dharmeshadithvarma.medium.com/branch-and-bound-6b0897c37e96 )

  Here is the screenshot for the given program.

[axrav]

@mayyyur this is not actually relevant repository to add this,This repository is more based on algorithms and basic beginner friendly solutions, I am closing the request for now,Feel free to have a look on issues and solve them!