Count how many elements are even at an even index.

Difficulty: Easy

Phase: 6 · Mixed Logical Challenges

XP Reward: 10 XP

Topics: Mixed Logical Challenges, Easy

Supported Languages: Python, JavaScript, C, C++, Java

Problem Description

Given sorted array of N integers, remove duplicates in-place and print the unique elements separated by space. Input Format: Read input from standard input (stdin). Output Format: Print the result to standard output (stdout).

Constraints

-10^9 <= N <= 10^9

Examples

Example 1

Input: 6 1 1 2 2 3 4

Output: 1 2 3 4

Explanation: Sample execution for input 6 1 1 2 2 3 4