Find elements that are in one array but not in the other.

Difficulty: Hard

Phase: 4 · Basic Arrays

XP Reward: 30 XP

Topics: Basic Arrays, Hard

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

Problem Description

Given array A followed by array B, print elements present in A but not in B (unique, in order of appearance in A). 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: 4 1 2 3 4 2 3 4

Output: 1 2

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