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๐Ÿ’ป codetree: solved ๋ฌธ์ž์—ด์˜ ๊ฐœ์ˆ˜
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import java.io.*;
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import java.util.*;
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/**
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* 1. ๋ฌธ์ œ์ •๋ณด
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* - ์ œ๋ชฉ : ๋ฌธ์ž์—ด์˜ ๊ฐœ์ˆ˜
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* - ๋งํฌ : https://www.codetree.ai/missions/4/problems/number-of-spring/description
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* 2. ํ’€์ดํ•ต์‹ฌ
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* - ๋ฌธ์ž์—ด ๋น„๊ต
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* 3. ํ’€์ดํ›„๊ธฐ
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* - ๊ฐ„๋‹จํ•œ ๋ฌธ์ œ ํ’€์ด
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*/
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public class Main {
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public static void main(String[] args) throws Exception {
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BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
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StringBuffer sb = new StringBuffer();
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int n = 0;
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for (n = 0;;n++) {
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String str = br.readLine();
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if (str.equals("0")) break;
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if (n % 2 == 0) sb.append(str).append("\n");
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}
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System.out.printf("%d\n%s", n, sb.toString());
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}
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}

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