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๐Ÿƒ‍โ™€๏ธprogrammers/Java

หšโ‚Šโœฉโ€งโ‚Š ๐Ÿ“ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค - java ์ •์ˆ˜๋ฅผ ๋‚˜์„ ํ˜•์œผ๋กœ ๋ฐฐ์น˜ํ•˜๊ธฐ หšโ‚Šโœฉโ€งโ‚Š

HYEJU01 2024. 5. 11. 22:06
์ฒด๊ฐ Level : โ˜… โ˜… โ˜…
Review:  ๋ˆˆ๋ฌผ์ด ๋‚œ๋‹ค... ์ด๋ ‡๊ฒŒ ์–ด๋ ค์šด ๋ฌธ์ œ๊ฐ€ ๋‚˜์˜ฌ๋•Œ๋ฉด ์กฐ๊ฑด ์žก๋Š”๊ฒŒ ๋„ˆ๋ฌด ์–ด๋ ต๋‹ค.
๊ทธ๋ž˜๋„ ๋‚˜์„ ํ˜•์œผ๋กœ ๋ฐฐ์น˜ํ•˜๋Š” ๊ฒฝ์šฐ ๊บพ์ด๋Š” ๊ธฐ์ค€ (์ฆ๊ฐ)์œผ๋กœ ํ’€๋ฉด ๋˜๋Š” ๊ฑธ ์•Œ์•˜๋‹ค.
(ํ˜ผ์ž ๋‹ค์‹œ ํ’€์–ด๋ณด๋ผ๊ณ ํ•˜๋ฉด ๋ชป ํ•  ๊ฒƒ ๊ฐ™์€,,)

 

 

 

ํ•˜๋‹จ ๋ธ”๋กœ๊ทธ ์ด๋ก  ๋ณด๊ณ  ํžŒํŠธ๋ฅผ ์–ป์–ด๋ดค์ง€๋งŒ  ๋„์ €ํžˆ........ ์ฝ”๋“œ๋ฅผ ๋ชป ์งœ๊ฒ ์–ด์š” 

https://blog.naver.com/PostView.nhn?blogId=tipsware&logNo=221294854442

 

[์‹ค์Šต] N ์ฐจ ํ–‰๋ ฌ์— ์ˆซ์ž ์ฑ„์šฐ๊ธฐ

:   C ์–ธ์–ด ๊ด€๋ จ ์ „์ฒด ๋ชฉ์ฐจ http://blog.naver.com/tipsware/221010831969 1. ์‹ค์Šต ๋‚ด์šฉ ์ด๋ฒˆ ...

blog.naver.com


 

 

 

start = 0 ;

end = n;

x = 0 ,y =0;

 

(start,0) ~ (start, end)  --->y ๊ฐ’  ์ฆ๊ฐ€

(1,end-1) ~(n,end-1)  --->x ๊ฐ’  ์ฆ๊ฐ€

 

(end-1,end-2) ~ ( end-1 , 0)  --->y ๊ฐ’  ๊ฐ์†Œ

(end-2,0) ~(1,0)  --->x ๊ฐ’  ๊ฐ์†Œ 

 

์ด๋Ÿฐ ๊ทœ์น™์ด ์ƒ๊ธฐ๊ฒŒ ๋œ๋‹ค.

 

ํ•œ๋ฐ”ํ€ด ๋Œ๋ ค์ฃผ๊ณ , start , end ๊ฐ’์„ ์กฐ์ ˆํ•ด์ค€๋‹ค.

( ์•ˆ์œผ๋กœ ๋“ค์–ด๊ฐˆ ์ˆ˜๋ก ํฌ๊ธฐ๊ฐ€ ์ž‘์•„์ง€๋ฏ€๋กœ ์กฐ์ ˆ์ด ํ•„์š”ํ•จ)

 

class Solution {
    public int[][] solution(int n) {
        int[][] answer = new int[n][n];
        int num=1;
        int start=0;
        int end=n;

        while(num <= n*n){

        //->
        for(int j=start;j<end;j++)
            answer[start][j]=num++;
        //v
        for(int i=start+1;i<end;i++)
            answer[i][end-1]=num++;
        //<
        for(int j=end-2;j>=start;j--)
            answer[end-1][j]=num++;
        //^
        for(int i=end-2;i>start;i--)
            answer[i][start]=num++;
        start++;
        end--;

        }

        return answer;
    }
}