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1. Mocha and Math
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2. Flipping bits
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3. And Then There Were K
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4. Tenzing and Books
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5. MEXor Mixup
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6. Simple XOR
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7. Find Xor-Beauty of Array
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8. Split AND Sum
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9. Sansa and XOR
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10. The Great XOR
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11. Hamon Odyssey
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12. Xor-sequence
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13. Cipher
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14. Vampiric Powers, anyone?
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15. Maximize Ones
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16. Lisa and the Martians
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17. Maximizing the Function
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18. Mikasa
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19. Yet Another Minimax Problem
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20. Bit Guessing Game
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21. Yet Another Bitwise Problem
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22. Vika and Wiki
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