[ Update ] .gitignore
[ Add ] Problem 26 C Algorithm
[ Create ] Problem 26
[ Update ] Problem 26 TASK.md
[ Create ] Problem 27
[ Update] .gitignore
[ Add ] Problem 27 C Algorithm
[ Update ] Problem 27 C Algorithm
[ Update ] Problem 27 C Algorithm
[ Create ] Problem 28
[ Update ] .gitignore
[ ADD ] Problem 28 C Algorithm