How Can I Efficiently Read Input from stdin in Programming Challenges?

Efficient Input Reading from stdin

In programming challenges, stdin often serves as the primary source of input. For example, in code golf competitions, participants aim to write the most compact code that can process data from stdin. Reading from stdin efficiently is crucial for success in such challenges.

One of the most effective ways to read from stdin is through the fileinput module. Here's how you can utilize it:

import fileinput

for line in fileinput.input():
    pass

This code snippet demonstrates how fileinput works. It loops through all the lines present in the input, which can be specified as file names during command execution. In cases where no arguments are provided, it defaults to standard input.

It's important to note that the lines read by fileinput include trailing newlines. If you need to remove them, simply use the line.rstrip() method. With this approach, you can easily parse and process input data from stdin, unlocking the full potential of your code in code golf challenges.

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