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Unique Maximum Number

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3.8 (12 votes)

Hash table

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Basic programming

Easy

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Problem

73% Success 6258 Attempts 20 Points 5s Time Limit 256MB Memory 1024 KB Max Code

Given an array A . Find the highest unique element in array A . Unique element means that element should present only once in the array. Input: First line of input contains N, size of array A . Next line contains N space separated elements of array A . Output: Print highest unique number of array A . If there is no any such element present in array then print -1 . Constraints: 1 \leq N \leq 10 6 0 \leq A i \leq 10 9

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