Auswahlsart verlinkte Liste Java
// Java implementation of the approach
class GFG {
// Linked List Node
static class Node {
int data;
Node next;
};
// Utility function to create a
// new Linked List Node
static Node newNode(int val)
{
Node temp = new Node();
temp.data = val;
temp.next = null;
return temp;
}
// Function to sort a linked list using selection
// sort algorithm by swapping the next pointers
static Node selectionSort(Node head)
{
Node a, b, c, d, r;
a = b = head;
// While b is not the last node
while (b.next != null) {
c = d = b.next;
// While d is pointing to a valid node
while (d != null) {
if (b.data > d.data) {
// If d appears immediately after b
if (b.next == d) {
// Case 1: b is the head of the linked list
if (b == head) {
// Move d before b
b.next = d.next;
d.next = b;
// Swap b and d pointers
r = b;
b = d;
d = r;
c = d;
// Update the head
head = b;
// Skip to the next element
// as it is already in order
d = d.next;
}
// Case 2: b is not the head of the linked list
else {
// Move d before b
b.next = d.next;
d.next = b;
a.next = d;
// Swap b and d pointers
r = b;
b = d;
d = r;
c = d;
// Skip to the next element
// as it is already in order
d = d.next;
}
}
// If b and d have some non-zero
// number of nodes in between them
else {
// Case 3: b is the head of the linked list
if (b == head) {
// Swap b.next and d.next
r = b.next;
b.next = d.next;
d.next = r;
c.next = b;
// Swap b and d pointers
r = b;
b = d;
d = r;
c = d;
// Skip to the next element
// as it is already in order
d = d.next;
// Update the head
head = b;
}
// Case 4: b is not the head of the linked list
else {
// Swap b.next and d.next
r = b.next;
b.next = d.next;
d.next = r;
c.next = b;
a.next = d;
// Swap b and d pointers
r = b;
b = d;
d = r;
c = d;
// Skip to the next element
// as it is already in order
d = d.next;
}
}
}
else {
// Update c and skip to the next element
// as it is already in order
c = d;
d = d.next;
}
}
a = b;
b = b.next;
}
return head;
}
// Function to print the list
static void printList(Node head)
{
while (head != null) {
System.out.print(head.data + " ");
head = head.next;
}
}
// Driver Code
public static void main(String args[])
{
Node head = newNode(5);
head.next = newNode(4);
head.next.next = newNode(3);
head = selectionSort(head);
printList(head);
}
}
// This code is contributed by Arnab Kundu
Random Dude