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From devblogs.microsoft.com/oldnewthingView original ↗
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Finding a duplicated item in an array of N integers in the range 1 to N − 1

The article discusses an algorithm for finding a duplicated item in an array of N integers where each integer is in the range 1 to N-1. It explains how to leverage the special characteristics of this constrained array to efficiently identify the duplicate element.

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