feat: Revised the book (#978)

* Sync recent changes to the revised Word.

* Revised the preface chapter

* Revised the introduction chapter

* Revised the computation complexity chapter

* Revised the chapter data structure

* Revised the chapter array and linked list

* Revised the chapter stack and queue

* Revised the chapter hashing

* Revised the chapter tree

* Revised the chapter heap

* Revised the chapter graph

* Revised the chapter searching

* Reivised the sorting chapter

* Revised the divide and conquer chapter

* Revised the chapter backtacking

* Revised the DP chapter

* Revised the greedy chapter

* Revised the appendix chapter

* Revised the preface chapter doubly

* Revised the figures
This commit is contained in:
Yudong Jin
2023-12-02 06:21:34 +08:00
committed by GitHub
parent b824d149cb
commit e720aa2d24
404 changed files with 1537 additions and 1558 deletions
@@ -11,7 +11,7 @@ func bucketSort(nums: inout [Double]) {
var buckets = (0 ..< k).map { _ in [Double]() }
// 1. 将数组元素分配到各个桶中
for num in nums {
// 输入数据范围 [0, 1),使用 num * k 映射到索引范围 [0, k-1]
// 输入数据范围为 [0, 1),使用 num * k 映射到索引范围 [0, k-1]
let i = Int(num * Double(k))
// 将 num 添加进桶 i
buckets[i].append(num)
+1 -1
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@@ -37,7 +37,7 @@ func heapSort(nums: inout [Int]) {
}
// 从堆中提取最大元素,循环 n-1 轮
for i in stride(from: nums.count - 1, to: 0, by: -1) {
// 交换根节点与最右叶节点(即交换首元素与尾元素)
// 交换根节点与最右叶节点(交换首元素与尾元素)
nums.swapAt(0, i)
// 以根节点为起点,从顶至底进行堆化
siftDown(nums: &nums, n: i, i: 0)
+2 -2
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@@ -14,7 +14,7 @@ func swap(nums: inout [Int], i: Int, j: Int) {
/* 快速排序类 */
/* 哨兵划分 */
func partition(nums: inout [Int], left: Int, right: Int) -> Int {
// 以 nums[left] 作为基准数
// 以 nums[left] 为基准数
var i = left
var j = right
while i < j {
@@ -87,7 +87,7 @@ func quickSortTailCall(nums: inout [Int], left: Int, right: Int) {
while left < right {
// 哨兵划分操作
let pivot = partition(nums: &nums, left: left, right: right)
// 对两个子数组中较短的那个执行快排
// 对两个子数组中较短的那个执行快速排序
if (pivot - left) < (right - pivot) {
quickSortTailCall(nums: &nums, left: left, right: pivot - 1) // 递归排序左子数组
left = pivot + 1 // 剩余未排序区间为 [pivot + 1, right]
+1 -1
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@@ -12,7 +12,7 @@ func digit(num: Int, exp: Int) -> Int {
/* 计数排序(根据 nums 第 k 位排序) */
func countingSortDigit(nums: inout [Int], exp: Int) {
// 十进制的位范围为 0~9 ,因此需要长度为 10 的桶
// 十进制的位范围为 0~9 ,因此需要长度为 10 的桶数组
var counter = Array(repeating: 0, count: 10)
let n = nums.count
// 统计 0~9 各数字的出现次数