-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathLeetcode25.cpp
More file actions
88 lines (73 loc) · 2.15 KB
/
Leetcode25.cpp
File metadata and controls
88 lines (73 loc) · 2.15 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
// Leetcode25.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
#include <vector>
using namespace::std;
struct ListNode
{
int val;
ListNode* next;
ListNode() : val(0), next(nullptr) {}
ListNode(int x) : val(x), next(nullptr) {}
ListNode(int x, ListNode* next) : val(x), next(next) {}
};
ListNode* listCreate(vector<int>& v)
{
ListNode* p = nullptr, * t = nullptr;
for (auto vi : v)
{
//int a = 1;
//int* pa = &a;
ListNode* node = new ListNode(vi);
//ListNode node = ListNode(vi);
if (p == nullptr)
p = node;
if (t == nullptr)
t = node;
else
{
t->next = node;
t = node;
}
}
return p;
}
ListNode* reverseKGroup(ListNode* head, int k)
{
ListNode* temp = head;
for (int i = 1; i <= k; ++i)
{
if (temp == nullptr)
return head;
else
temp = temp->next;
}
ListNode* tempHead = head, * tempTail = head;
ListNode* tmpAfter = nullptr, * tmpBefore = nullptr;
for (int i = 1; i <= k; ++i)
{
tmpAfter = tempHead->next;
tempHead->next = tmpBefore;
tmpBefore = tempHead;
tempHead = tmpAfter;
}
head->next = reverseKGroup(tempHead, k);
return tmpBefore;
}
int main()
{
vector<int> vi = { 1,2,3,4,5 };
int k = 3;
ListNode* pl = listCreate(vi);
ListNode* res = reverseKGroup(pl, k);
std::cout << "Hello World!\n";
}
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file