언어 별 io 성능 개선

C++

	#include <iostream>
	int main()
	{
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(nullptr);
	while (true) {
	int n;
	std::cin >> n;
	if (n == -1) {
	break;
	}
	solve(n);
	}
	return 0;
	}

view raw cplpl_io.cpp hosted with ❤ by GitHub

---

Go

	package main
	import (
	"bufio"
	"fmt"
	"os"
	)
	var r *bufio.Reader
	var w *bufio.Writer
	func init() {
	r = bufio.NewReader(os.Stdin)
	w = bufio.NewWriter(os.Stdout)
	}
	func main() {
	defer w.Flush()
	for {
	n := 0
	fmt.Fscan(r, &n)
	if n == -1 {
	break
	}
	solve(n)
	}
	fmt.Fprintln(w, "End.")
	}

view raw go_io.go hosted with ❤ by GitHub

---

Rust

	use std::io::Write;
	use std::io::BufRead;
	fn main() {
	let stdin = std::io::stdin();
	let stdin = stdin.lock();
	let mut stdin = std::io::BufReader::new(stdin);
	let stdout = std::io::stdout();
	let stdout = stdout.lock();
	let mut stdout = std::io::BufWriter::new(stdout);
	loop {
	let mut input = String::new();
	stdin.read_line(&mut input).unwrap();
	let ab = input.trim()
	.split_whitespace()
	.map(|s| s.parse::<i32>().unwrap()).
	collect::<Vec<i32>>();
	if ab[0] + ab[1] == 0 {
	break;
	}
	let result = solve(ab[0], ab[1]);
	writeln!(stdout, "{result}").unwrap();
	}
	}

view raw rst_io.rs hosted with ❤ by GitHub

---

Python

	import sys
	N = int(sys.stdin.readline().rstrip())
	M = int(sys.stdin.readline().rstrip())
	cache = [-1] * 10001
	cache[1] = 1
	sum = 0
	m_prime = 20000
	if sum == 0:
	sys.stdout.write("-1")
	else:
	sum = "{}\n".format(sum)
	m_prime = "{}\n".format(m_prime)
	sys.stdout.write(sum)
	sys.stdout.write(m_prime)
	# 그냥 print 써도 상관 없는 듯.

view raw py_io.py hosted with ❤ by GitHub

---

Java

	import java.io.*;
	import java.util.Arrays;
	public class Main {
	public static void main(String[] args) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
	final String strN = br.readLine();
	final String []strArr = br.readLine().split(" ");
	final int N = Integer.parseInt(strN);
	final int[] arr = Arrays.stream(strArr).mapToInt(Integer::parseInt).toArray();
	final int result = solve(arr);
	bw.write(""+result);
	bw.newLine();
	bw.flush();
	}
	}

view raw java_io.java hosted with ❤ by GitHub