Use any algorithm knowledge to solve this problem.

Suppose you work for a detective agency and for work purpose you need to communicate with your teammates using some different scheme so that it cannot be detected, and you don't have efficient communicating device as well. You need to state your statement using this array "HEEEDWARAAVJOOUUMNCLF", but system efficiency is also a matter of concern. You must transform that array intro a meaningful sentence and required frequency need to be chosen for transferring your statement to your teammates. Build a program that can perform that communication. Note: Write the code in C programing language and comment before every line. Also, make a summary of your work which will explain your solving method