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Nonamed Develog

[TIL] AI 웹 개발 7기 사전 캠프 5-5 본문

WHAT I LEARN/TIL

[TIL] AI 웹 개발 7기 사전 캠프 5-5

노네임드개발자 2024. 6. 21. 18:35

 

 

일일 알고리즘/SQL 코드카타

알고리즘33) 정수 left와 right가 매개변수로 주어집니다. left부터 right까지의 모든 수들 중에서, 약수의 개수가 짝수인 수는 더하고, 약수의 개수가 홀수인 수는 뺀 수를 return 하도록 solution 함수를 완성해주세요.

 

제한사항

1 ≤ left ≤ right ≤ 1,000

def solution(left, right):
    answer = 0
    for i in range(left, right+1):
        count = 0
        for j in range(1, i+1):
            if i % j == 0:
                count += 1
        if count % 2 == 0:
            answer += i
        else:
            answer -= i
    return answer

아이디어는 좋았지만 count = 0의 위치로 인해 시간을 많이 잡아 먹었던 문제였다. 반복문과 조건문을 이용할 때 count = 0이라는 요소도 같이 적어주는데 이 것의 위치가 중요하다는 사실을 알게 되었다.

 

SQL33) 상품 별 오프라인 매출 구하기

SELECT product_code,
       SUM(p.price*o.sales_amount) sales
FROM product p INNER JOIN offline_sale o ON p.product_id = o.product_id
GROUP BY product_code
ORDER BY SUM(p.price * o.sales_amount) DESC,
         product_code

문제를 읽을 때 합계를 보지 못하여 SUM() 함수를 넣지 못했다. 문제를 먼저 이해한 후 문제 풀이를 해보자.

 

 

멜로디쉐어

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</head>

<body data-bs-theme="dark">
    <div class="background-banner">
        <nav class="navbar border-bottom border-body d-flex justify-content-space-between" data-bs-theme="dark">
            <div class="ms-3">
                <img src="https://s3.ap-northeast-2.amazonaws.com/materials.spartacodingclub.kr/webjong/images/sparta-logo.svg"
                    alt="">
            </div>
            <nav class="navbar navbar-expand-lg">
                <div class="container-fluid">
                    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav"
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                    노래를 들으면 생각나는 누군가가 있으신가요?
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                        음악 추가
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                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
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                        <form>
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                                <label for="exampleInputEmail1" class="form-label">유저</label>
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                            <div class="mb-3">
                                <label for="exampleInputPassword1" class="form-label">가수</label>
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                        class="card-img-top" alt="...">
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                        <p class="card-text">IVE(아이브)</p>
                        <p class="card-text">추천 by 최지웅</p>
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                        <h5 class="card-title">러브 다이브</h5>
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                        class="card-img-top" alt="...">
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                        <h5 class="card-title">러브 다이브</h5>
                        <p class="card-text">IVE(아이브)</p>
                        <p class="card-text">추천 by 최지웅</p>
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                        class="card-img-top" alt="...">
                    <div class="card-body">
                        <h5 class="card-title">러브 다이브</h5>
                        <p class="card-text">IVE(아이브)</p>
                        <p class="card-text">추천 by 최지웅</p>
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                    <li class="ms-3"><a class="link-body-emphasis" href="https://www.youtube.com/@SpartaCodingClub"><i
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