LeetCode之Flipping an Image（Kotlin）

问题： Given a binary matrix A, we want to flip the image horizontally, then invert it, and return the resulting image. To flip an image horizontally means that each row of the image is reversed. For example, flipping [1, 1, 0] horizontally results in [0, 1, 1]. To invert an image means that each 0 is replaced by 1, and each 1 is replaced by 0. For example, inverting [0, 1, 1] results in [1, 0, 0].

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方法： 参考代码实现。

具体实现：

class FlippingAnImage {
    fun flipAndInvertImage(A: Array<IntArray>): Array<IntArray> {
        for (i in A.indices) {
            for (j in 0..A.lastIndex / 2) {
                val temp = A[i][j]
                A[i][j] = invert(A[i][A.lastIndex - j])
                A[i][A.lastIndex - j] = invert(temp)
            }
        }
        return A
    }

    private fun invert(num: Int): Int {
        if (num == 0) {
            return 1
        } else {
            return 0
        }
    }
}

fun main(args: Array<String>) {
    val array = arrayOf(intArrayOf(1, 1, 0), intArrayOf(1, 0, 1), intArrayOf(0, 0, 0))
    val flippingAnImage = FlippingAnImage()
    flippingAnImage.flipAndInvertImage(array)
    CommonUtils.print2DIntArray(array)
}
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有问题随时沟通

具体代码实现能够参考Github