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ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java ๊ณต๋ฐฑ์œผ๋กœ ๊ตฌ๋ถ„ํ•˜๊ธฐ 2

๐Ÿ’ก  split ๊ณต๋ฐฑ์„ ๊ธฐ์ค€์œผ๋กœ ๋ถ„ํ• ํ•˜์—ฌ ๋ฐฐ์—ด๋กœ ์ €์žฅํ•œ๋‹ค. ํ•˜์ง€๋งŒ ๊ณต๋ฐฑ - ๊ณต๋ฐฑ ์‚ฌ์ด๋Š” ๋นˆ๋ฌธ์ž์—ด๋กœ ์ƒ์„ฑ๋œ๋‹ค.์ดํ›„ ๋ฌธ์ž์—ด๋ฐฐ์—ด str ์„ ๋Œ๋ ค๊ฐ€๋ฉฐ ๋น„๋ฌธ์ž์—ด์ด ์•„๋‹Œ ๊ฒฝ์šฐ์—๋งŒ์ƒˆ๋กœ์šด ๋™์  ๋ฐฐ์—ด์— ๋„ฃ์–ด์ฃผ๋ฉด ๊ฐ’๋งˆ๋‹ค ๋ฐฐ์—ด๋กœ ๋“ค์–ด๊ฐ€๊ฒŒ๋œ๋‹ค.   ๐Ÿ’ฌ isEmpty()  :: ๊ฐ’์ด ๋น„์–ด์žˆ๋Š”์ง€ ํ™•์ธ   ๐Ÿ’ฌ  str.split()  :: ๊ณต๋ฐฑ์„ ๊ธฐ์ค€์œผ๋กœ ๋ถ„ํ• ํ•˜์—ฌ ๋ฐฐ์—ด๋กœ ์ €์žฅ์—ฐ์†๋œ ๊ณต๋ฐฑ์ด ์žˆ์„ ๋•Œ, split ์˜ ๋™์ž‘ ::๋ฌธ์ž์—ด์„ ๋ถ„ํ• ํ•  ๋•Œ, ์ฃผ์–ด์ง„ ๊ตฌ๋ถ„์ž(์—ฌ๊ธฐ์„œ๋Š” ๊ณต๋ฐฑ)๋ฅผ ๊ธฐ์ค€์œผ๋กœ ๋ฌธ์ž์—ด์„ ๋‚˜๋ˆ„๊ฒŒ ๋ฉ๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์—ฐ์†๋œ ๊ณต๋ฐฑ์ด ์žˆ๋Š” ๊ฒฝ์šฐ์—๋Š” ์ด๋Ÿฌํ•œ ๊ณต๋ฐฑ๋“ค์ด ํ•˜๋‚˜์˜ ๊ตฌ๋ถ„์ž๋กœ ์ทจ๊ธ‰๋˜์–ด์„œ ๋ถ„ํ• ๋ฉ๋‹ˆ๋‹ค. ๊ทธ๋ฆฌ๊ณ  ์—ฐ์†๋œ ๊ณต๋ฐฑ ์‚ฌ์ด์—๋Š” ์•„๋ฌด๋Ÿฐ ๋ฌธ์ž๋„ ์—†๊ธฐ ๋•Œ๋ฌธ์— ํ•ด๋‹น ์œ„์น˜์—์„œ ๋นˆ ๋ฌธ์ž์—ด์ด ์ƒ์„ฑ๋ฉ๋‹ˆ๋‹ค.import java.util.Arr..

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java ad ์ œ๊ฑฐํ•˜๊ธฐ

๐Ÿ’ก ๋ฌธ์ž์—ด ๋ฐฐ์—ด ์ค‘ ๋ฌธ์ž์—ด์— ad ๊ฐ€ ๋“ค์–ด๊ฐ„ ๊ฐ’์€ ์ œ์™ธํ•˜๋ฉด ๋œ๋‹ค.ad ๊ฐ€ ๋“ค์–ด์žˆ์ง€ ์•Š์€ ๊ฐ’์„ ArrayList์— ๋„ฃ์–ด ๋ฆฌํ„ดํ•ด์คฌ๋‹ค.  ๐Ÿ’ฌ contains()  ::  ์ž๋ฐ”์—์„œ ๋ฌธ์ž์—ด์ด๋‚˜ ์ปฌ๋ ‰์…˜(์˜ˆ: ๋ฐฐ์—ด, ๋ฆฌ์ŠคํŠธ ๋“ฑ)์— ํŠน์ • ๊ฐ’์ด ํฌํ•จ๋˜์–ด ์žˆ๋Š”์ง€๋ฅผ ํ™•์ธํ•˜๋Š” ๊ธฐ๋Šฅ์„ ์ œ๊ณต  import java.util.ArrayList;class Solution { public ArrayList solution(String[] strArr) { ArrayList str = new ArrayList(); for (int i =0 ; i

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java ๋ฌธ์ž์—ด์ด ๋ช‡ ๋ฒˆ ๋“ฑ์žฅํ•˜๋Š”์ง€ ์„ธ๊ธฐ

๐Ÿ’ก  ๊ฐ์ด ์•ˆ์žกํ˜€์„œ ์ข‹์€ ์ฝ”๋“œ๋ฅผ ์ฐธ๊ณ ํ–ˆ๋‹ค.  substring์„ ํ†ตํ•ด์„œ ๋ฌธ์ž์—ด์„ ์•ž์—์„œ๋ถ€ํ„ฐ ์ค„์—ฌ๊ฐ€๋ฉด์„œ pat ์œผ๋กœ ์‹œ์ž‘๋˜๋Š”์ง€ ํ™•์ธํ•˜๊ฒŒํ•œ๋‹ค !!  ๐Ÿ’ฌ substring(i) :: i๋ถ€ํ„ฐ ๋๊นŒ์ง€ ์ถœ๋ ฅ๐Ÿ’ฌ startsWith() :: ๋ฌธ์ž์—ด์ด ํŠน์ • ์ ‘๋‘์‚ฌ pat๋กœ ์‹œ์ž‘ํ•˜๋Š”์ง€ ์—ฌ๋ถ€๐Ÿ’ฌ endsWith() :: ๋ฌธ์ž์—ด์ด ํŠน์ • ์ ‘๋ฏธ์‚ฌ๋กœ ๋๋‚˜๋Š”์ง€ ์—ฌ๋ถ€๋ฅผ ํ™•์ธํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ class Solution { public int solution(String myString, String pat) { int cnt = 0; for(int i=0; i

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java ํŠน์ • ๋ฌธ์ž์—ด๋กœ ๋๋‚˜๋Š” ๊ฐ€์žฅ ๊ธด ๋ถ€๋ถ„ ๋ฌธ์ž์—ด ์ฐพ๊ธฐ

๐Ÿ’ก  ํ•˜๋‹จ์— ์‹คํŒจํ•œ ์ด์œ ์ฒ˜๋Ÿผ a ๊ฐ€ ์—ฐ์†์œผ๋กœ ๋‚˜์˜ค๋Š” ๊ฒฝ์šฐ ๋งˆ์ง€๋ง‰๊ฐ’์„ ํ™•์ธํ•ด์ฃผ๋Š” ๋ฐฉ๋ฒ•์ด ํ•„์š”ํ•˜๋‹ค๊ทธ๋ž˜์„œ ์ด ๊ฒฝ์šฐ์—๋Š” IndexOf() ๋ณด๋‹จ ,  lastIndexOf() ๋ฅผ ์‚ฌ์šฉํ•ด์ค€๋‹ค.  ํฌ์ธํŠธ๋Š”!!  ๋‘ ๋ฉ”์„œ๋“œ๋Š” ์ฒซ ๊ฐ’์„ ๋ฐ˜ํ™˜ํ•˜๋ฏ€๋กœ๋๊ฐ’์„ ์•Œ๊ธฐ ์œ„ํ•ด์„œ๋Š” pat ์˜ ๊ธธ์ด (์ฐพ์„ ๋‹จ์–ด์˜ ๊ธธ์ด) ๋งŒํผ ๋”ํ•ด์ค˜์•ผํ•œ๋‹ค.  ์ด๋•Œ substring ์€  ์ข…๋ฃŒ ์ธ๋ฑ์Šค๋Š” ํฌํ•จํ•˜์ง€ ์•Š์œผ๋ฏ€๋กœ (-1)  ๊ธธ์ด๊ฐ€ ๋”ฑ ๋งž๊ฒŒ๋œ๋‹ค.   ๐Ÿ’ฌ lastIndexOf()  :: ๋ฌธ์ž์—ด์—์„œ ๋’ค์ชฝ๋ถ€ํ„ฐ ํŠน์ • ๋ถ€๋ถ„ ๋ฌธ์ž์—ด ์ฐพ์•„์„œ ๋ฐ˜ํ™˜ (์ฒซ๋ฒˆ์งธ ๋‹จ์–ด ๊ฐ’์„ ์ธ๋ฑ์Šค๋กœ ๋ฐ˜ํ™˜ํ•จ)๐Ÿ’ฌ  indexOf()  :: ๋ฌธ์ž์—ด์—์„œ ํŠน์ • ๋ถ€๋ถ„ ๋ฌธ์ž์—ด์˜ ์ฒซ ๋ฒˆ์งธ ๋ฐœ์ƒ ์œ„์น˜ ๋ฐ˜ํ™˜   class Solution { public String solution(String ..

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java ํŠน์ •ํ•œ ๋ฌธ์ž๋ฅผ ๋Œ€๋ฌธ์ž๋กœ ๋ฐ”๊พธ๊ธฐ

๐Ÿ’ก ๊ฐ„๋‹จํ•˜๊ฒŒ replace ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•ด์ฃผ๋ฉฐ, ๋ฏธ๋ฆฌ ๋Œ€๋ฌธ์ž๋กœ ๋ฐ”๊ฟ”๋‘”๋ฌธ์ž๋ฅผ ๋ฐ”๊ฟ€๋ฌธ์ž์— ๋„ฃ์–ด์ฃผ๋ฉด ๋! ๐Ÿ’ฌ  ๋ฌธ์ž์—ด.replace (๋ฌธ์ž, ๋ฐ”๊ฟ€๋ฌธ์ž)  :: ๋ฌธ์ž์—ด์—์„œ ํŠน์ • ๋ฌธ์ž ๋˜๋Š” ๋ฌธ์ž์—ด์„ ๋‹ค๋ฅธ ๋ฌธ์ž ๋˜๋Š” ๋ฌธ์ž์—ด๋กœ ๋Œ€์ฒด class Solution { public String solution(String my_string, String alp) { String answer = ""; String tmp = ""; tmp = alp.toUpperCase(); answer = my_string.replace(alp,tmp); return answer; }}

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java A ๊ฐ•์กฐํ•˜๊ธฐ

๐Ÿ’ก ๋ฌธ์ œ๊ฐ€ ์กฐ๊ธˆ ํ—ท๊ฐˆ๋ฆฌ๋Š”๋ฐ ์ •๋ฆฌ๋ฅผ ํ•ด๋ณด์ž๋ฉด์†Œ๋ฌธ์ž a ๊ฐ€ ๋‚˜์˜ค๋ฉด ์ „๋ถ€ ->  ๋Œ€๋ฌธ์ž๋กœ ๋ณ€๊ฒฝ๊ทธ๋ฆฌ๊ณ  ๋Œ€๋ฌธ์ž A ๊ฐ€ ์•„๋‹Œ ๋ชจ๋“  ์•ŒํŒŒ๋ฒณ์€ -> ์†Œ๋ฌธ์ž๋กœ ๋ณ€๊ฒฝ์ด๋•Œ ์ฃผ์˜ํ•  ์ ์ด ๋Œ€๋ฌธ์ž A๊ฐ€ ๋‚˜์™”์„ ๋•Œ ์ฒ˜๋ฆฌํ•˜๋Š” ์กฐ๊ฑด์„ ๊ฑธ์–ด์ค˜์•ผํ•œ๋‹ค. ๐Ÿ’ฌ  char[] charArray = myString.toCharArray();  // ๋ฌธ์ž์—ด์„ ๋ฌธ์ž ๋ฐฐ์—ด๋กœ ๊ฐ€์ ธ์˜ค๊ธฐ๐Ÿ’ฌ  for (char ch : charArray){ // for-each ๋ฃจํ”„๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌธ์ž ๋ฐฐ์—ด์„ ์ˆœํšŒํ•œ๋‹ค.๐Ÿ’ฌ String.valueOf(ch).toUpperCase(); // ๋ฌธ์ž๋ฅผ ์ŠคํŠธ๋ง์œผ๋กœ ๋ณ€ํ™˜ํ•ด์„œ ๋„ฃ์–ด์ค€๋‹ค.๐Ÿ’ฌ apple".replace('p', 'P')  :: ๋ชจ๋“  p ๋ฅผ P ๋กœ ๋งŒ๋“ ๋‹ค. class Solution { public String so..

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java ๋ฐฐ์—ด์—์„œ ๋ฌธ์ž์—ด ๋Œ€์†Œ๋ฌธ์ž ๋ณ€ํ™˜ํ•˜๊ธฐ

๐Ÿ’ก ํ™€์ˆ˜์ธ๋ฑ์Šค๋Š” ๋Œ€๋ฌธ์ž, ์ง์ˆ˜ ์ธ๋ฑ์Šค๋Š” ์†Œ๋ฌธ์ž๋ฐ˜ํ™˜๋˜๋Š” ๋ฐฐ์—ด์‚ฌ์ด์ฆˆ๋Š” ๋™์ผํ•˜๋ฏ€๋กœ ๋ฌธ์ž์—ด ๋ฐฐ์—ด์— ํฌ๊ธฐ๋งŒ ๋˜‘๊ฐ™์ด ์ง€์ •ํ•ด์ค€๋‹ค(๋™์ ๋ฐฐ์—ด ์„ ์–ธ ํ•„์š” X)์ดํ›„ ํ™€์ˆ˜ ์ง์ˆ˜ ์กฐ๊ฑด๋ฌธ์„ ํ†ตํ•ด ๋Œ€์†Œ๋ฌธ์ž ๋ฉ”์„œ๋“œ๋ฅผ ์‚ฌ์šฉํ•ด์ค€๋‹ค.class Solution { public String[] solution(String[] strArr) { String[] answer = new String[strArr.length]; for (int i = 0 ; i

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค java - ์›ํ•˜๋Š” ๋ฌธ์ž์—ด ์ฐพ๊ธฐ

๐Ÿ’ก๋Œ€์†Œ๋ฌธ์ž๊ฐ€ ์„ž์—ฌ์žˆ๊ธฐ๋•Œ๋ฌธ์—๋‘˜๋‹ค ๋Œ€๋ฌธ์ž or ์†Œ๋ฌธ์ž๋กœ ํ†ต์ผํ•ด์ค˜์„œ ๋น„๊ตํ•ด์ค€๋‹ค. ๐Ÿ’ฌ str. toUpperCase() : ๋Œ€๋ฌธ์ž ๋ณ€๊ฒฝ๋ฉ”์†Œ๋“œ ๐Ÿ’ฌ str . toLowerCase() : ์†Œ๋ฌธ์ž ๋ณ€๊ฒฝ ๋ฉ”์†Œ๋“œ class Solution { public int solution(String myString, String pat) { int answer = 0; myString = myString.toUpperCase(); pat = pat.toUpperCase(); if (myString.contains(pat)) { answer = 1; }else { answer = 0; ..

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค java - ๊ธธ์ด์— ๋”ฐ๋ฅธ ์—ฐ์‚ฐ

๐Ÿ’ก   ๋ฆฌ์ŠคํŠธ ๊ธธ์ด๊ฐ€ 11 ์ด์ƒ -> ์ „๋ถ€ ํ•ฉ  / 10 ์ดํ•˜๋ฉด -> ๊ณฑ์ฃผ์˜ํ•  ์ ์€ ๊ณฑํ•  ๋•Œ ์ดˆ๊ธฐ ๊ฐ’์ด 1์ด์–ด์•ผํ•œ๋‹ค.#include #include #include // num_list_len์€ ๋ฐฐ์—ด num_list์˜ ๊ธธ์ด์ž…๋‹ˆ๋‹ค.int solution(int num_list[], size_t num_list_len) { int answer = 0; int tmp = 1; for (int i =0; i = 11){ answer += num_list[i]; // ๋ชจ๋“  ์›์†Œ์˜ ํ•ฉ }else if (num_list_len

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java 1๋กœ ๋งŒ๋“ค๊ธฐ

๐Ÿ’กwhile ๋ฌธ๊ณผ for ๋ฌธ์„ ์ด์šฉํ•ด์„œ ํ’€์–ด์ฃผ๋ฉด ๋œ๋‹ค!1์ด ๋˜๋ฉด answer ๊ฐ’์„ ์ฆ๊ฐ€์‹œํ‚ค๋ฏ€๋กœwhile ์˜ ์กฐ๊ฑด๋ฌธ์„ 1์ด ๋˜๊ธฐ ์ „๊นŒ์ง€๋กœ ์„ค์ •ํ•ด์ฃผ๋ฉด ๋œ๋‹ค. (num_list[i] != 1)#include #include #include int solution(int num_list[], size_t num_list_len) { int answer = 0; int num = 0 ; for (int i = 0 ; i