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* ์ ๊ทผ ๋ฐฉ๋ฒ :
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* - right -> bottom -> left -> top ์์๋ก ์งํํ๋ฉด์ ๊ฒฝ๊ณ ์
๋ฐ์ดํธ ์ฒ๋ฆฌ
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*
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- * ์๊ฐ๋ณต์ก๋ : O(m x n)
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- * - m x n ํ๋ ฌ์ ๋ชจ๋ ์ซ์ ๋ฐฉ๋ฌธํ๋๊น O(m x n)
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+ * ์๊ฐ๋ณต์ก๋ : O(n)
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+ * - n์ ํ๋ ฌ์ ๋ชจ๋ ์ซ์๋ก, ๋ชจ๋ ์ซ์๋ฅผ ํ ๋ฒ์ฉ ๋ฐฉ๋ฌธํ๋ฏ๋ก O( n)
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*
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* ๊ณต๊ฐ๋ณต์ก๋ : O(n)
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- * - ์ซ์ ๊ธธ์ด๋งํผ ๋ฐฐ์ด์ ๋ด์ *
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+ * - ๋ชจ๋ ์ซ์๋ฅผ ์ ์ฅํ๊ธฐ ์ํด์ ๋ฐฐ์ด ์ฌ์ฉํ๋ฏ๋ก O(n)
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*/
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function spiralOrder ( matrix : number [ ] [ ] ) : number [ ] {
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*
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* ๊ณต๊ฐ๋ณต์ก๋ : O(k)
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* - pairs ๊ฐ์ฒด ๊ณ ์ ๋ ํฌ๊ธฐ๋ก ์ ์ฅ O(1)
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- * - stack์ ์ด๋ฆฐ ๊ดํธ ๊ฐ์๋งํผ ๋ด๊ธฐ๋๊น O(k)
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+ * - k๋ ์ด๋ฆฐ ๊ดํธ ๊ฐ์, stack์ ์ ์ฒด ๋ฌธ์์ด ์ค k๋งํผ๋ง ๋ด๊ธฐ๋๊น O(k)
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*/
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function isValid ( s : string ) : boolean {
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