Square List Elements

Background

Congcong is learning to process list data. He encountered a basic problem that requires performing a simple mathematical operation on each number in a list.

Problem Description

Given a list of integers, return a new list where each integer is replaced by its square.

Input Format

Input is given from Standard Input in the following format.

The input consists of a single line representing a list of integers. The integers in the list are space-separated and enclosed in square brackets []. If the list is empty, the input is [].

Output Format

Output to Standard Output in the following format.

The output consists of a single line representing the processed list of integers. The integers in the list are comma-separated, followed by a space, and enclosed in square brackets []. If the list is empty, the output is [].

Sample

[1 2 3]

[1, 4, 9]

[6 8 -6 -8 1]

[36, 64, 36, 64, 1]

[]

[]

Sample Explanation

Sample 1: The input list is [1 2 3]. Squaring each element yields [1*1, 2*2, 3*3], which is [1, 4, 9]. Sample 2: The input list is [6 8 -6 -8 1]. Squaring each element yields [36, 64, 36, 64, 1]. Sample 3: An empty input list [] returns an empty list [].

Constraints

Time limit: 1 second. Memory limit: 1024 KiB for each test case.