Preparing NOJ

Given a sequence of N numbers, find a number A that the count of A in the sequence is at least two.

Second line: N positive integers (<= 1000000).

8 2 4 2 1 5 3 9 6

2

Info

Provider NOIOPEN

Origin 简单英文题

Code NOIOPJENGLISH19

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Date 08/15/2021 18:56:23

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