Question: Let's have a c++ program that takes a file input of class records that amount to hundreds of thousands of lines. How do you write

Let's have a c++ program that takes a file input of class records that amount to hundreds of thousands of lines. How do you write a program that counts each unique line with arrays that array B skips duplicates. How do you write the loops that don't a long time to output (it checks the entire list for each element). Preferably without vectors.

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