Remove extra spaces between words (normalize spacing).

Difficulty: Hard

Phase: 5 · Strings

XP Reward: 30 XP

Topics: Strings, Hard

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

Problem Description

Remove multiple contiguous spaces between words and trim leading/trailing whitespace (normalize spacing to single spaces). 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: Learn to code well

Output: Learn to code well

Explanation: Sample execution for input Learn to code well