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Hello World: The classical introductory exercise. Just say "Hello, World!". C# Python
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Two Fer: Create a sentence of the form "One for X, one for me." C# Python
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Gigasecond: Given a moment, determine the moment that would be after a gigasecond has passed. C# Python
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Isogram: Determine if a word or phrase is an isogram. C# Python
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Reverse String: Reverse a string. Python
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Acronym: Convert a phrase to its acronym. C#
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RNA Transcription: Given a DNA strand, return its RNA complement (per RNA transcription). Python
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Grains: Calculate the number of grains of wheat on a chessboard given that the number on each square doubles. C#
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Perfect Numbers: Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for natural numbers. C#
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Collatz Conjecture: Solve the Collatz Conjecture or 3x+1 problem.
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Phone Number: Clean up user-entered phone numbers so that they can be sent SMS messages. C#
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Scrabble Score: Given a word, compute the scrabble score for that word. C#
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Meetup: Calculate the date of meetups.