๋ณธ๋ฌธ ๋ฐ”๋กœ๊ฐ€๊ธฐ

JAVA/๊ธฐํƒ€3

Java Fast I/O 3 (feat. BOJ, String, StringBuilder) ์•ž์„  ํฌ์ŠคํŠธ์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ ์‚ฌ๋žŒ๋“ค์€ PS์—์„œ ์†๋„๋ฅผ ๊ฐœ์„ ํ•˜๊ธฐ ์œ„ํ•œ ๋ฐฉ๋ฒ• ์ค‘ ํ•˜๋‚˜๋กœ StringBuilder๋ฅผ ์‚ฌ์šฉํ•œ๋‹ค. StringBuilderabstract sealed class AbstractStringBuilder implements Appendable, CharSequence permits StringBuilder, StringBuffer { byte[] value; byte coder; boolean maybeLatin1; int count; private static final byte[] EMPTYVALUE = new byte[0]; AbstractStringBuilder() { value = EMPTYVALUE; } .. 2024. 7. 6.
Java Fast I/O 2 (feat. BOJ, StringTokenizer, String.split()) ์ด๋ฒˆ ํฌ์ŠคํŠธ์—๋Š” StringTokenizer์— ๋Œ€ํ•ด ์ž‘์„ฑํ•ด๋ณด๋ ค๊ณ  ํ•ฉ๋‹ˆ๋‹ค.PS์—์„œ ์–ด๋–ป๊ฒŒ๋“  ์†๋„๋ฅผ ์กฐ๊ธˆ ๋” ๋†’์—ฌ๋ณด๋ ค๊ณ  ์‚ฌ๋žŒ๋“ค์ด ์—ฌ๋Ÿฌ ๋ฐฉ๋ฒ•์„ ์‚ฌ์šฉํ•˜์ฃ ?๊ทธ ์ค‘ ํ•˜๋‚˜๊ฐ€ StringTokenizer ์ž…๋‹ˆ๋‹ค. ์ •๋ง StringTokenizer์˜ ์„ฑ๋Šฅ์ด ๊ทธ๋ ‡๊ฒŒ ์šฐ์ˆ˜ํ• ๊นŒ? ์ง์ ‘ ํ…Œ์ŠคํŠธ ํ•ด๋ดค์Šต๋‹ˆ๋‹ค.package com.study.datastructrue.string;import java.util.StringTokenizer;public class DevidePerformTest { public static void main(String[] args) { String str = "one two three four five one two three four five one two three four five.. 2024. 7. 6.
Java Fast I/O (feat. BOJ, BufferedReader, BufferedWriter) BOJ JAVA ํ’€์ด์—์„œ ์™œ BufferedReader, BufferedWriter ๋ฅผ ์‚ฌ์šฉํ• ๊นŒ? ์‚ฌ๋žŒ๋“ค์€ PS ์ค‘ ์‹œ๊ฐ„ ํšจ์œจ์„ ์กฐ๊ธˆ์ด๋ผ๋„ ์˜ฌ๋ฆฌ๊ธฐ ์œ„ํ•ด์„œ Fast I/O๋ฅผ ์‚ฌ์šฉํ•œ๋‹ค.๋ณดํ†ต I/O ์†๋„๋Š” Default I/O, Fast I/O, Custom Fast I/O ๊ฐ€ ์žˆ๋‹ค.์ฐ ๊ณ ์ˆ˜๋“ค์€ ์ข…์ข… Custom Fast I/O๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๋Š”๋ฐ ๋‚˜๋Š” ๊ธฐ๋ณธ์ ์ธ Fast I/O๋งŒ ์‚ฌ์šฉํ•œ๋‹ค. (์ดˆ๋ณด) Python ์—์„œ๋Š” sys.stdin.readline, C++ ์—์„œ๋Š” ios_base::sync_with_stdio(0), C์—์„œ๋Š” fread() ๋“ฑJava์—์„œ๋Š” BufferedReader ๋‚˜ BufferedWriter๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๋‹ค. ๊ทธ๋Ÿผ ์™œ ์‚ฌ์šฉํ•˜๋Š”์ง€ ํ•œ ๋ฒˆ ์•Œ์•„๋ณด์ž. BufferedR.. 2024. 7. 6.