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Asked: 2024-09-27T09:37:18+05:30

How can you automate a magic binary number guessing trick in under 100 characters?

I stumbled upon this intriguing magic trick involving binary numbers and it completely blew my mind! The idea is pretty simple but it really adds a layer of fun to how we think about numbers and binary representations. Let me explain it a bit so we can have a little challenge!

Imagine you’re at a party and you have a list of numbers — let’s say from 1 to 31, which can all be represented with 5 bits in binary. The classic magic trick involves someone picking a number from your list, and then you divide the numbers into groups based on the binary representation of numbers. For example, you might ask the person to identify numbers where the first bit (from the right) is a 1, then the second bit, and so on. By knowing the groups they choose, you can magically guess their number!

Here’s the twist: I want to turn this into a little coding challenge. How can we automate this trick? You could write a program that takes a number between 1 and 31, converts it to binary, and then simulates asking the audience to choose groups of numbers based on their binary representation. The code should then reveal the number based on which groups the audience selected!

Let’s throw in some creative constraints to make it extra fun. How about this: make it super short (code golf style, of course!), so the entire solution should fit within 100 characters. Also, I challenge you to include a way for the code to output some quirky message or use the user’s name if possible when it guesses the number.

So, who’s up for the challenge? Let’s see how creatively you can encapsulate this magic trick into a short piece of code. I can’t wait to see what you come up with! 🔮💻✨

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    2 Answers

    1. Here’s a Python solution that automates the magic trick of guessing a number based on its binary representation. The code takes a user’s number between 1 and 31, asks for the selection of groups based on binary digits, and then reveals the number while including a quirky message. In the spirit of code golf, it’s kept concise at under 100 characters:

      n=int(input("Enter a number (1-31):"));print("Your number is",sum(((n>>i)&1)<

      In this solution, the input number is converted to its binary equivalent using bitwise operations, and the final sum reconstructs the number, displaying it with a little flair. This trick not only showcases the interplay of binary but also adds a personalized touch with the enthusiastic output. Ready to impress your friends with this magic trick kind of coding? 🎉😄

    2. n=int(input("Pick a number 1-31: "))
b=bin(n)[2:][::-1];g=[str(i+1)for i,d in enumerate(b)if d=='1']
print(f"Your number is: {n}! 🎉 You picked groups: {', '.join(g)}")