1번

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2번

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책사서 한번 풀어봐는데, 기발한 문제들이 있어서 올려봄.
특히 2번은 답보고 깊게 생각해야되는 문제구나라고 느꼈음.
교육과정 외에 내용이 좀 들어가지만 풀때 크게 문제는 없을거임.

- dc official App