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[Algorithm] 행렬의 덧셈 #88

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hwangJi-dev opened this issue Jan 24, 2023 · 0 comments
Closed

[Algorithm] 행렬의 덧셈 #88

hwangJi-dev opened this issue Jan 24, 2023 · 0 comments

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@hwangJi-dev
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hwangJi-dev commented Jan 24, 2023

💬 문제

[코딩테스트 연습 - 행렬의 덧셈](https://school.programmers.co.kr/learn/courses/30/lessons/12950)


💬 풀이

func solution(_ arr1:[[Int]], _ arr2:[[Int]]) -> [[Int]] {
    var result = arr1
    for i in 0..<arr1.count {
        for j in 0..<arr1[i].count {
            result[i][j] = arr1[i][j] + arr2[i][j]
        }
    }
    return result
}

💬 더 나은 방법?

func solution(_ arr1:[[Int]], _ arr2:[[Int]]) -> [[Int]] {
    return zip(arr1, arr2).map{ zip($0, $1).map{ $0 + $1 } }
}
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