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Two people want to flip a coin to decide something, but they know the coin is biased – the probability of getting heads and tails is different. The question is – how can they flip a coin? Assume that the players don't know the exact probabilities, and figuring them out would be time-consuming and difficult.
They don't have a normal coin.
Regarding "rock-paper-scissors," it's a simple game of chance, equivalent to flipping a coin. Whoever had the stronger strategy won.
