MediumCodingTechnical

Given a list of trades, iterate to return buy/sell pairs and overall profit.

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Robinhood

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To pair buy and sell trades and calculate overall profit, we can use a stack-based approach. Iterate through the trades, storing 'buy' orders on a stack. When a 'sell' order is encountered, pair it with the most recent 'buy' order from the stack. Calculate the profit or loss for this pair and accumulate it towards the total profit. This method ensures that trades are matched chronologically, providing an accurate profit calculation for each pair and the overall portfolio.

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