添加py和js,添加注释

This commit is contained in:
jaredliw 2021-07-13 23:39:22 +08:00
parent 2e9819611c
commit 474937e864

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@ -43,7 +43,6 @@ Java Code:
```java ```java
class Solution { class Solution {
public ListNode reverseBetween(ListNode head, int left, int right) { public ListNode reverseBetween(ListNode head, int left, int right) {
//虚拟头节点 //虚拟头节点
ListNode temp = new ListNode(-1); ListNode temp = new ListNode(-1);
temp.next = head; temp.next = head;
@ -53,25 +52,27 @@ class Solution {
for (; i < left-1; ++i) { for (; i < left-1; ++i) {
pro = pro.next; pro = pro.next;
} }
// 保存 left 节点前的一个节点 //保存 left 节点前的一个节点
ListNode leftNode = pro; ListNode leftNode = pro;
//来到 right 节点
for (; i < right; ++i) { for (; i < right; ++i) {
pro = pro.next; pro = pro.next;
} }
// 保存 right 节点后的节点 //保存 right 节点后的一个节点
ListNode rightNode = pro.next; ListNode rightNode = pro.next;
//切断链表 //切断链表
pro.next = null; pro.next = null;//切断 right 后的部分
ListNode newhead = leftNode.next; ListNode newhead = leftNode.next;//保存 left 节点
leftNode.next = null; leftNode.next = null;//切断 left 前的部分
leftNode.next = rever(newhead); //反转
leftNode.next = reverse(newhead);
//重新接头 //重新接头
newhead.next = rightNode; newhead.next = rightNode;
return temp.next; return temp.next;
} }
//和反转链表1代码一致 //和反转链表1代码一致
public ListNode rever (ListNode head) { public ListNode reverse (ListNode head) {
ListNode low = null; ListNode low = null;
ListNode pro = head; ListNode pro = head;
while (pro != null) { while (pro != null) {
@ -91,6 +92,7 @@ C++ Code:
class Solution { class Solution {
public: public:
ListNode* reverseBetween(ListNode* head, int left, int right) { ListNode* reverseBetween(ListNode* head, int left, int right) {
//虚拟头节点
ListNode * temp = new ListNode(-1); ListNode * temp = new ListNode(-1);
temp->next = head; temp->next = head;
ListNode * pro = temp; ListNode * pro = temp;
@ -99,23 +101,26 @@ public:
for (; i < left-1; ++i) { for (; i < left-1; ++i) {
pro = pro->next; pro = pro->next;
} }
// 保存 left 节点前的一个节点 //保存 left 节点前的一个节点
ListNode * leftNode = pro; ListNode * leftNode = pro;
//来到 right 节点
for (; i < right; ++i) { for (; i < right; ++i) {
pro = pro->next; pro = pro->next;
} }
// 保存 right 节点后的节点 //保存 right 节点后的一个节点
ListNode * rightNode = pro->next; ListNode * rightNode = pro->next;
//切断链表 //切断链表
pro->next = nullptr; pro->next = nullptr;//切断 right 后的部分
ListNode * newhead = leftNode->next; ListNode * newhead = leftNode->next;//保存 left 节点
leftNode->next = nullptr; leftNode->next = nullptr;//切断 left 前的部分
leftNode->next = rever(newhead); //反转
leftNode->next = reverse(newhead);
//重新接头 //重新接头
newhead->next = rightNode; newhead->next = rightNode;
return temp->next; return temp->next;
} }
ListNode * rever (ListNode * head) { //和反转链表1代码一致
ListNode * reverse (ListNode * head) {
ListNode * low = nullptr; ListNode * low = nullptr;
ListNode * pro = head; ListNode * pro = head;
while (pro != nullptr) { while (pro != nullptr) {
@ -129,3 +134,90 @@ public:
}; };
``` ```
JS Code:
```js
var reverseBetween = function(head, left, right) {
//虚拟头节点
let temp = new ListNode(-1);
temp.next = head;
let pro = temp;
//来到 left 节点前的一个节点
let i = 0;
for (; i < left-1; ++i) {
pro = pro.next;
}
//保存 left 节点前的一个节点
let leftNode = pro;
//来到 right 节点
for (; i < right; ++i) {
pro = pro.next;
}
//保存 right 节点后的一个节点
let rightNode = pro.next;
//切断链表
pro.next = null;//切断 right 后的部分
let newhead = leftNode.next;//保存 left 节点
leftNode.next = null;//切断 left 前的部分
//反转
leftNode.next = reverse(newhead);
//重新接头
newhead.next = rightNode;
return temp.next;
};
//和反转链表1代码一致
var reverse = function(head) {
let low = null;
let pro = head;
while (pro) {
let temp = pro;
pro = pro.next;
temp.next = low;
low = temp;
}
return low;
};
```
Python Code:
```py
class Solution:
def reverseBetween(self, head: ListNode, left: int, right: int) -> ListNode:
# 虚拟头节点
temp = ListNode(-1)
temp.next = head
pro = temp
# 来到 left 节点前的一个节点
for _ in range(left - 1):
pro = pro.next
# 保存 left 节点前的第一个节点
leftNode = pro
for _ in range(right - left + 1):
pro = pro.next
# 保存 right 节点后的节点
rightNode = pro.next
# 切断链表
pro.next = None # 切断 right 后的部分
newhead = leftNode.next # 保存 left 节点
leftNode.next = None # 切断 left 前的部分
# 反转
leftNode.next = self.reverse(newhead)
# 重新接头
newhead.next = rightNode
return temp.next
# 和反转链表1代码一致
def reverse(self, head):
low = None
pro = head
while pro is not None:
temp = pro
pro = pro.next
temp.next = low
low = temp
return low
```