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Update the book based on the revised second edition (#1014)
* Revised the book * Update the book with the second revised edition * Revise base on the manuscript of the first edition
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@@ -34,7 +34,7 @@ func bubbleSortWithFlag(nums: inout [Int]) {
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flag = true // 记录交换元素
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}
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}
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if !flag { // 此轮冒泡未交换任何元素,直接跳出
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if !flag { // 此轮“冒泡”未交换任何元素,直接跳出
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break
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}
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}
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@@ -6,12 +6,12 @@
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/* 合并左子数组和右子数组 */
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func merge(nums: inout [Int], left: Int, mid: Int, right: Int) {
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// 左子数组区间 [left, mid], 右子数组区间 [mid+1, right]
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// 左子数组区间为 [left, mid], 右子数组区间为 [mid+1, right]
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// 创建一个临时数组 tmp ,用于存放合并后的结果
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var tmp = Array(repeating: 0, count: right - left + 1)
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// 初始化左子数组和右子数组的起始索引
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var i = left, j = mid + 1, k = 0
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// 当左右子数组都还有元素时,比较并将较小的元素复制到临时数组中
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// 当左右子数组都还有元素时,进行比较并将较小的元素复制到临时数组中
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while i <= mid, j <= right {
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if nums[i] <= nums[j] {
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tmp[k] = nums[i]
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@@ -45,7 +45,7 @@ func quickSort(nums: inout [Int], left: Int, right: Int) {
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/* 快速排序类(中位基准数优化) */
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/* 选取三个元素的中位数 */
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/* 选取三个候选元素的中位数 */
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func medianThree(nums: [Int], left: Int, mid: Int, right: Int) -> Int {
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if (nums[left] < nums[mid]) != (nums[left] < nums[right]) {
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return left
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