algorithm/hello-algo
1
0
Fork 0
mirror of https://github.com/krahets/hello-algo.git synced 2025-12-19 07:17:54 +08:00
Code Issues Packages Projects Releases Wiki Activity

Polish the chapter

Browse Source 
introduction, computational complexity.
This commit is contained in:
krahets
2023-08-20 14:51:39 +08:00
parent 5fb728b3d6
commit 2626de8d0b
87 changed files with 375 additions and 371 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
codes/cpp/chapter_heap/my_heap.cpp
View File

@@ -9,7 +9,7 @@
/* 大顶堆 */
class MaxHeap {
private:
// 使用动态数组，这样无需考虑扩容问题
// 使用动态数组，这样无须考虑扩容问题
vector<int> maxHeap;
/* 获取左子节点索引 */
@@ -32,7 +32,7 @@ class MaxHeap {
while (true) {
// 获取节点 i 的父节点
int p = parent(i);
// 当“越过根节点”或“节点无需修复”时，结束堆化
// 当“越过根节点”或“节点无须修复”时，结束堆化
if (p < 0 || maxHeap[i] <= maxHeap[p])
break;
// 交换两节点
@@ -47,12 +47,12 @@ class MaxHeap {
while (true) {
// 判断节点 i, l, r 中值最大的节点，记为 ma
int l = left(i), r = right(i), ma = i;
// 若节点 i 最大或索引 l, r 越界，则无需继续堆化，跳出
// 若节点 i 最大或索引 l, r 越界，则无须继续堆化，跳出
if (l < size() && maxHeap[l] > maxHeap[ma])
ma = l;
if (r < size() && maxHeap[r] > maxHeap[ma])
ma = r;
// 若节点 i 最大或索引 l, r 越界，则无需继续堆化，跳出
// 若节点 i 最大或索引 l, r 越界，则无须继续堆化，跳出
if (ma == i)
break;
swap(maxHeap[i], maxHeap[ma]);