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1. Check if a number is prime
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Solved by 393
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2. Sum of every prime number below n
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Solved by 274
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3. Print every prime numbers in a range
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Solved by 193
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4. Next prime
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Solved by 176
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5. Reverse Roman Numerals
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Solved by 340
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6. Friday the 13th
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Solved by 257
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7. The missing card
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Solved by 270
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8. Playing with anagrams
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Solved by 54
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9. Flatten lists
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Solved by 230
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10. Perfect deck shuffle
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Solved by 221
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11. The Fibonacci sequence
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Solved by 233
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12. Hearts emojis
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Solved by 191
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13. Draw N Squares
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Solved by 156
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14. Pernicious numbers
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Solved by 147
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15. Side by side
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Solved by 88
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16. Largest product in a series
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Solved by 104
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17. Roman Numerals
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Solved by 95
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18. Caesar Cypher
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Solved by 97
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19. Longest Collatz sequence
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Solved by 94
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20. Largest product in a grid
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Solved by 74
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21. Break a safe
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Solved by 84
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22. Password Generator
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Solved by 72
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23. bencode / bdecode
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Solved by 48
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24. Py Master Mind
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Solved by 54
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25. Elementary cellular automaton
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Solved by 44
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26. Sequence Mining
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Solved by 28
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27. Change for 42€
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Solved by 28
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28. Pascal's triangle
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Solved by 28
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29. IRC logs as CSV
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Solved by 16
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