Queue and Node question
public static bool EqualSums(Queue<int> q)
{
int first = q.Remove();
int last = RemoveLast(q);
int sum = first + last;
Queue<int> c = q;
for(int i = 0; i < Length(q)/2; i++)
{
if(q.Remove() + RemoveLast(q) != sum)
{
return false;
}
}
if(!q.IsEmpty() && q.Remove() != sum) { return false; }
return true;
}
public static void RemoveEqualSums(Node<Queue<int>> lst)
{
Node<Queue<int>> curr = lst;
if (EqualSums(curr.GetValue()) == false)
{
curr.SetNext(null);
}
while (curr.GetNext() != null)
{
if(EqualSums(curr.GetNext().GetValue()) ==false)
{
curr.SetNext(curr.GetNext().GetNext());
curr.GetNext().SetNext(null);
}
curr = curr.GetNext();
} } why is this code incorrect? please help
} } why is this code incorrect? please help
1 Reply
public static bool EqualSums(Queue<int> q)
{
// Helper method to remove and return the last element of the queue
static int RemoveLast(Queue<int> q)
{
int last;
Queue<int> temp = new Queue<int>();
while (q.Count > 1)
{
temp.Enqueue(q.Dequeue());
}
last = q.Dequeue(); // The last element
while (temp.Count > 0)
{
q.Enqueue(temp.Dequeue());
}
return last;
}
// Make a copy of the queue
Queue<int> copy = new Queue<int>(q);
int first = copy.Dequeue();
int last = RemoveLast(copy);
int sum = first + last;
// Verify sums in the remaining elements
while (copy.Count > 1)
{
int front = copy.Dequeue();
int back = RemoveLast(copy);
if (front + back != sum)
{
return false;
}
}
// If there's one element left, check if it equals the required sum
if (copy.Count == 1 && copy.Dequeue() != sum)
{
return false;
}
return true;
}
public static void RemoveEqualSums(Node<Queue<int>> lst)
{
Node<Queue<int>> curr = lst;
while (curr != null && curr.GetNext() != null)
{
if (!EqualSums(curr.GetNext().GetValue()))
{
curr.SetNext(curr.GetNext().GetNext());
}
else
{
curr = curr.GetNext();
}
}
}
// Assume Node class definition with appropriate methods
public class Node<T>
{
private T value;
private Node<T> next;
public Node(T value)
{
this.value = value;
this.next = null;
}
public T GetValue()
{
return value;
}
public Node<T> GetNext()
{
return next;
}
public void SetNext(Node<T> next)
{
this.next = next;
}
}