Merge overlapping intervals

　　

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The kth permutation sequence.

　　

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DualPivotSort

Arrays.sort()背后排序原理剖析

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Find the length of the longest consecutive elements sequence.

　　

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The kth largest element

　　

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Searching Rotated array

Searching a specific number in a rotated array　　

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maxAreaOfIsland

Calculate the max area of island.

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Restore IP address

Restore IP address，returning all possible valid IP address combinations.

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Simplify path

Simplify Unix path

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The sum of three elements is zero

Find all unique triplets in the array which gives the sum of zero.

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