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-[49. Group Anagrams](https://leetcoder.net/en/leetcode/49-group-anagrams) Python, Ruby.
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#String
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##String
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-[28. Find the Index of the First Occurrence in a String](en/1-1000/28-find-the-index-of-the-first-occurrence-in-a-string.md) Python, Java, C++, JavaScript, C#, Go, Ruby.
-[139. Word Break](en/1-1000/139-word-break.md) Python, Java, C++, JavaScript, C#, Go, Ruby.
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##Stock Maximum Profit Problems
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###Stock Maximum Profit Problems
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-[121. Best Time to Buy and Sell Stock](en/1-1000/121-best-time-to-buy-and-sell-stock.md) Python, JavaScript, Go.
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-[122. Best Time to Buy and Sell Stock II](en/1-1000/122-best-time-to-buy-and-sell-stock-ii.md) Python, JavaScript, Go.
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-[714. Best Time to Buy and Sell Stock with Transaction Fee](en/1-1000/714-best-time-to-buy-and-sell-stock-with-transaction-fee.md) Python, JavaScript, Go.
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-[123. Best Time to Buy and Sell Stock III](en/1-1000/123-best-time-to-buy-and-sell-stock-iii.md) Python, JavaScript, Go.
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-[188. Best Time to Buy and Sell Stock IV](en/1-1000/188-best-time-to-buy-and-sell-stock-iv.md) Python, JavaScript, Go.
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-[309. Best Time to Buy and Sell Stock with Cooldown](en/1-1000/309-best-time-to-buy-and-sell-stock-with-cooldown.md) Python, JavaScript, Go.
-[3494. Find the Minimum Amount of Time to Brew Potions](https://leetcoder.net/en/leetcode/3494-find-the-minimum-amount-of-time-to-brew-potions) Python, Java, C++, JavaScript, C#, Go, Ruby.
-[84. Largest Rectangle in Histogram](en/1-1000/84-largest-rectangle-in-histogram.md) Python, Java, C++, JavaScript, C#, Go, Ruby.
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#Graph Theory
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##Graph Theory
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-[797. All Paths From Source to Target](en/1-1000/797-all-paths-from-source-to-target.md) Python, Java, C++, JavaScript, C#, Go, Ruby,**2** ways.
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-[200. Number of Islands](en/1-1000/200-number-of-islands.md) Python, Java, C++, JavaScript, C#, Go, Ruby,**3** ways.
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-[463. Island Perimeter](en/1-1000/463-island-perimeter.md) Python,**2** ways.
@@ -134,7 +134,7 @@ You can skip the more difficult problems and do them later.
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-[787. Cheapest Flights Within K Stops](en/1-1000/787-cheapest-flights-within-k-stops.md) Python.
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-[1334. Find the City With the Smallest Number of Neighbors at a Threshold Distance](en/1001-2000/1334-find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance.md) Python.