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Commit 83a7a0b

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package LeetcodeQuestions;
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class cNode{
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int data;
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cNode next;
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public cNode(int data){
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this.data=data;
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}
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}
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public class detectCircleLL {
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// func to detect circular
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public static boolean detect(cNode head){
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cNode fast=head;
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cNode slow=head;
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while(fast!=null && fast.next!=null){
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slow=slow.next;
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fast=fast.next.next;
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if(slow==fast){
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return true;
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}
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}
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return false;
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}
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public static cNode startPoint(cNode head){
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cNode fast=head;
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cNode slow=head;
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boolean flag=false;
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while(fast!=null && fast.next!=null){
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slow=slow.next;
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fast=fast.next.next;
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if(slow==fast){
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flag=true;
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break;
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}
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}
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if(flag==false){
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return null;
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}
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fast=head;
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while(slow!=fast){
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slow=slow.next;
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fast=fast.next;
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}
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return slow;
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}
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public static void main(String[] args) {
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cNode head=new cNode(3);
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head.next=new cNode(2);
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head.next.next=new cNode(1);
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head.next.next=head;
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System.out.println(startPoint(head).data);
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System.out.println(detect(head));
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}
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}

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