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import java.util.LinkedList; | |
import java.util.List; | |
class Node { | |
int data; | |
Node next; | |
Node prev; | |
} | |
class MyDoubleLinkedList { | |
Node head; | |
public void moveMiddleToTop() { | |
Node slowPointer = head; | |
Node fastPointer = slowPointer; | |
while(fastPointer.next != null || fastPointer.next.next != null) { | |
slowPointer = slowPointer.next; | |
fastPointer = fastPointer.next.next; | |
} | |
Node temp = head; | |
Node beforeSlowPointer = slowPointer.prev; | |
beforeSlowPointer.next = slowPointer.next; | |
slowPointer.next = head.next; | |
head = slowPointer; | |
} | |
} |
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import java.util.LinkedList; | |
import java.util.List; | |
class Main { | |
public static void main(String[] args) { | |
LinkedList<Integer> linkedList = new LinkedList<>(List.of(1,5,2,3,7,87,345,23,342,5,3,34,5,9)); | |
System.out.println(occuranceCount(linkedList, 3)); | |
} | |
public static int occuranceCount(LinkedList<Integer> linkedList ,int data) { | |
int count = 0; | |
for (int i = 0; i < linkedList.size(); i++) { | |
if(linkedList.get(i) == data) count++; | |
} | |
return count; | |
} | |
} |
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