"detect and remove loop in a linked list" Code Answer's
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remove loop from linked list
//java
Node remove(Node head){
//detect the loop
Node slow=head;
Node fast=head;
while(slow!=null&&fast!=null&&fast.next!=null){
slow=slow.next;
fast=fast.next.next;
if(slow==fast){
if(slow==head){
while(slow.next!=head){
slow=slow.next;
}
slow.next=null;
}
if(slow==fast){
slow=head;
while(slow.next!=fast.next){
if(slow==fast.next){
fast.next=null;
}
slow=slow.next;
fast=fast.next;
}
fast.next=null;
}
}
}
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