Sliding Window

Blind 75

Best Time to Buy & Sell Stock

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public class BestTimeToBuySellStock {
    public int maxProfit(int[] prices) {
        int sell = 0;
        int buy = Integer.MAX_VALUE;
        for (int price: prices) {
            if (price < buy) {
                buy = price;
            }
            else {
                sell = Math.max(sell, price - buy);
            }
        }
        return sell;
    }
}

Longest Substring Without Repeating Characters

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Longest Repeating Character Replacement

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Minimum Window Substring

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Drawing Explanation

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