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public static Node removeBottom(Node headNode , int index){
if(headNode == null || index < 0){
return null;
}else if(index == 0){
return null;
}else{
Node lNode = null;
Node rNode = headNode;
for(int i=0;i<index;i++){
lNode = rNode;
rNode = rNode.next;
}
if(rNode == null){
System.out.println("Vị trí không tồn tại");
return headNode;
}else{
lNode.next = rNode.next;
}
return headNode;
}
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