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Problem
Given an array, find the length of the longest contiguous subarray with equal difference between adjacent elements.
Input format
Input
input.txt
- The first line contains N (1 ≤ N ≤ 100). - The second line contains N integers.
Output format
Output
output.txt
- The length of the longest arithmetic subarray.
Example
input
6 1 3 5 7 9 12
output
5
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Sample cases (from the problem)
Sample Case 1
Input
6 1 3 5 7 9 12
Expected output
5
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