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๐Ÿ“ฆ Changgo/โ˜•๏ธ Java๋ฅผ ์ž๋ฐ” 20

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : ์ฝ”๋“œ ์ฒ˜๋ฆฌํ•˜๊ธฐ

https://school.programmers.co.kr/learn/courses/30/lessons/181932 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr ๋ฌธ์ž์—ด code๊ฐ€ ์ฃผ์–ด์ง‘๋‹ˆ๋‹ค.code๋ฅผ ์•ž์—์„œ๋ถ€ํ„ฐ ์ฝ์œผ๋ฉด์„œ ๋งŒ์•ฝ ๋ฌธ์ž๊ฐ€ "1"์ด๋ฉด mode๋ฅผ ๋ฐ”๊ฟ‰๋‹ˆ๋‹ค. mode์— ๋”ฐ๋ผ code๋ฅผ ์ฝ์–ด๊ฐ€๋ฉด์„œ ๋ฌธ์ž์—ด ret์„ ๋งŒ๋“ค์–ด๋ƒ…๋‹ˆ๋‹ค.mode๋Š” 0๊ณผ 1์ด ์žˆ์œผ๋ฉฐ, idx๋ฅผ 0 ๋ถ€ํ„ฐ code์˜ ๊ธธ์ด - 1 ๊นŒ์ง€ 1์”ฉ ํ‚ค์›Œ๋‚˜๊ฐ€๋ฉด์„œ code[idx]์˜ ๊ฐ’์— ๋”ฐ๋ผ ๋‹ค์Œ๊ณผ ๊ฐ™์ด ํ–‰๋™ํ•ฉ๋‹ˆ๋‹ค.mode๊ฐ€ 0์ผ ๋•Œcode[idx]๊ฐ€ "1"์ด ์•„๋‹ˆ๋ฉด idx๊ฐ€ ์ง์ˆ˜์ผ ๋•Œ๋งŒ ret์˜..

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : ์กฐ๊ฑด ๋ฌธ์ž์—ด

https://school.programmers.co.kr/learn/courses/30/lessons/181934 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr class Solution { public int solution(String ineq, String eq, int n, int m) { int answer = 0; boolean goe = ineq.equals(">") && eq.equals("="); boolean loe = ineq.equals("") && eq.equals("!"); ..

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : ํ™€์ง์— ๋”ฐ๋ผ ๋‹ค๋ฅธ ๊ฐ’ ๋ฐ˜ํ™˜ํ•˜๊ธฐ

https://school.programmers.co.kr/learn/courses/30/lessons/181935 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr class Solution { public int solution(int n) { int answer = 0; for(int i=n; i>0; i-=2) { answer += n%2==1 ? i : i*i; } return answer; }}

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : ๊ณต๋ฐฐ์ˆ˜

https://school.programmers.co.kr/learn/courses/30/lessons/181936 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.krclass Solution { public int solution(int number, int n, int m) { int answer = 0; if(number%n==0 && number%m==0) { answer = 1; } else { answer = 0; } ..

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : n์˜ ๋ฐฐ์ˆ˜

https://school.programmers.co.kr/learn/courses/30/lessons/181937 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr class Solution { public int solution(int num, int n) { int answer = 0; if(num%n == 0) { answer = 1; } else { answer = 0; } return answer; }}

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : ๋‘ ์ˆ˜์˜ ์—ฐ์‚ฐ๊ฐ’ ๋น„๊ตํ•˜๊ธฐ

https://school.programmers.co.kr/learn/courses/30/lessons/181938 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr class Solution { public int solution(int a, int b) { int answer = 0; int first = Integer.parseInt(Integer.toString(a) + Integer.toString(b)); int second = 2*a*b; if(first>second..

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : ๋” ํฌ๊ฒŒ ํ•ฉ์น˜๊ธฐ

https://school.programmers.co.kr/learn/courses/30/lessons/181939 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr class Solution { public int solution(int a, int b) { int answer = 0; String A = Integer.toString(a); String B = Integer.toString(b); int first = Integer.parseInt(A+B); in..

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค : ๋ฌธ์ž์—ด ๊ณฑํ•˜๊ธฐ

https://school.programmers.co.kr/learn/courses/30/lessons/181940  ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr  class Solution { public String solution(String my_string, int k) { String answer = ""; for(int i=0; i

[Java] ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค: ๋ฌธ์ž ๋ฆฌ์ŠคํŠธ๋ฅผ ๋ฌธ์ž์—ด๋กœ ๋ณ€ํ™˜ํ•˜๊ธฐ

https://school.programmers.co.kr/learn/courses/30/lessons/181941 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.programmers.co.kr class Solution { public String solution(String[] arr) { String answer = ""; for(String i : arr) { answer += i; } return answer; }}

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