
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
write a java
A pair consists of two consecutive integers having the same value. Three or more values in a row do NOT make or contain a pair.
Input Format
Input is two lines of data.
First line is n, the number of elements in the integer list.
Second line is the list of numbers.
Constraints
first line - n - will be between 2 and 1000000 the values will be any valid java integer values.
Output Format
output a single integer value - the index of the first element of the pair of value.
if no pair exists, then output -1
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