How to read from and write to standard input and ouput.

c.c

#include <stdlib.h>

int main(){

    // Read integer from line
    int t; 
    scanf("%d",&t);
    
    // Read integer from line times
    for(int a0 = 0; a0 < t; a0++){
        int n; 
        scanf("%d",&n);
    }
    return 0;
}

cpp.cpp

int main(){
    int t;
    cin >> t;
    for(int a0 = 0; a0 < t; a0++){
        long n;
        cin >> n;
    }
    return 0;
}

go.go

import (
    "bufio"
    "fmt"
    "io"
    "os"
)

func main() {
    reader := bufio.NewReaderSize(os.Stdin, 16 * 1024 * 1024)

    stdout, err := os.Create(os.Getenv("OUTPUT_PATH"))
    checkError(err)
    defer stdout.Close()

    writer := bufio.NewWriterSize(stdout, 16 * 1024 * 1024)

    // Call readLine(reader) as many times as you need
    // checkError(err)
  
    // Get result

    // %d assumes an integer output, find the right format for your output
    fmt.Fprintf(writer, "%d\n", result)

    writer.Flush()
}

func readLine(reader *bufio.Reader) string {
    str, _, err := reader.ReadLine()
    if err == io.EOF {
        return ""
    }

    return strings.TrimRight(string(str), "\r\n")
}

func checkError(err error) {
    if err != nil {
        panic(err)
    }
}

j.java

import java.io.*;
import java.util.*;

public static void main(String[] args) throws IOException {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        // Read line from input into a string
        bufferedReader.readLine().replaceAll("\\s+$", "");

        // Read line from input and split by space into an array
        bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");
        
        // Read line from input, replace all white spaces, split the values on the line by space, convert them to int
        // and add them to alit
        try { 
            List<Integer> intInput = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
                .map(Integer::parseInt)
                .collect(toList());
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }

        // Get result

        // Write result to output
        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedReader.close();
        bufferedWriter.close();

}




// Using Scanner
import java.util.*;

public static void main(String[] args) throws IOException {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        
        Scanner myObj = new Scanner(System.in);  // Create a Scanner object
        System.out.println("Enter username");

        String userName = myObj.nextLine();  // Read user input
        System.out.println("Username is: " + userName);  // Output user input
        
        System.out.println(userName.contains("\\r\\n\\r\\n"));

}

node.js

'use strict';

const fs = require('fs');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', function(inputStdin) {
    inputString += inputStdin;
});

process.stdin.on('end', function() {
    inputString = inputString.split('\n');

    main();
});

function readLine() {
    return inputString[currentLine++];
}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    // Call readLine() as many times as you need.
    
    // get answer

    ws.write(answer + '\n');

    ws.end();
}

py.py

import sys

# Read t, then read t integers from the input
t = int(input().strip())
for a0 in range(t):
    n = int(input().strip())
    
    
# Read t, read 2 * t lines. In each iteration, split the first line by space and read the second line
t = int(input().strip())
for a0 in range(t):
    n,k = input().strip().split(' ')
    n,k = [int(n),int(k)]
    num = input().strip()
    
# To send value to stdout, use print()
print(val)

Please can you provide one for python?

Done @Shopiley

Thank you so much!