【单链表删除重复数据】在本地vs上运行没有问题，上传到oj系统是答案错误，请问有什么错误呀？实在找不出来了

题目内容

给定一个升序的单链表，删除单链表中的重复数据项，只保留独立的元素。

问题相关代码

#include <iostream>
using namespace std;

template <class T>
structhttps://img-mid.csdnimg.cn/release/static/image/mid/ask/591763467946145.png "#left")
 Node
{
    T data = 0;                    
    struct Node <T>* next;  
    Node() :data(0), next(NULL){}
    void print()
    {
        cout << data <<" ";
    }
};

template<class T>
class LinkList
{
public:
    LinkList()
    {
        front = new Node <T>;
        front->next = NULL;
    }
    LinkList(T a[], int n)
    {
        front = new Node<T>;
    int i;
    for (i = n - 1; i >= 0; i--)
    {
        Node <T>* s = new Node<T>;
        s->data = a[i];
        s->next = front->next;
        front->next = s;
    }
    }
    void PrintList();
    void DeleteRe();
private:
    Node <T>* front;
};

template<class T>
void LinkList<T>::PrintList()
{
    if (front->next == NULL)
    {
        cout << "empty" ;
    }
    else
    {
        Node<T>* p = front->next;
        while (p)
        {
            p->print();
            p = p->next;
        }
    }
}

template<class T>
void LinkList<T>::DeleteRe()
{ 
    if (front == NULL)
    {
        return;
    }
    Node<T>* p = front ;
        while (p->next&&p->next ->next)
        {
            
            if (p->next->data ==p->next->next->data)
            {
                Node<T>* q = p->next->next;
                while (q && q->data == p->next ->data)
                {
                    q = q->next;
                }
                p->next = q;
            }
            else
            {
                p = p->next;
            }
        }
}

int main()
{
    int len;
    cin >> len;
    if (len <= 0)
    {
        return 0;
    }
    else
    {
        int *array=new int [len];
        for (int i = 0; i < len; i++)
        {
            cin >> array[i];
        }
        LinkList<int> L1(array, len);

        L1.DeleteRe();
        L1.PrintList();
        return 0;
    }
}

运行结果及报错内容

oj上看不到问题到底是什么

要求用链表实现

修改如下，供参考：

#include <iostream>
using namespace std;
template <class T>
//structhttps://img-mid.csdnimg.cn/release/static/image/mid/ask/591763467946145.png "#left")
struct Node
{
    T data = 0;
    struct Node <T>* next;
    Node() :data(0), next(NULL) {}
    void print()
    {
        cout << data << " ";
    }
};
template<class T>
class LinkList
{
public:
    LinkList()
    {
        front = new Node <T>;
        front->next = NULL;
    }
    LinkList(T a[], int n)
    {
        front = new Node<T>;
        int i;
        for (i = n - 1; i >= 0; i--)
        {
            Node <T>* s = new Node<T>;
            s->data = a[i];
            s->next = front->next;
            front->next = s;
        }
    }
    void PrintList();
    void DeleteRe();
private:
    Node <T>* front;
};
template<class T>
void LinkList<T>::PrintList()
{
    if (front->next == NULL)
    {
        cout << "empty";
    }
    else
    {
        Node<T>* p = front->next;
        while (p)
        {
            p->print();
            p = p->next;
        }
    }
}
template<class T>
void LinkList<T>::DeleteRe()
{
    if (front == NULL)
    {
        return;
    }
    Node<T>* p = front;
    while (p->next)             //&& p->next->next)
    {
        if (p->next->data == p->next->next->data)
        {
            Node<T>* q = p->next->next;
            while (q && q->data == p->next->data)
            {
                Node<T>* r = q;
                q = q->next;
                delete r;
            }
            Node<T>* r = p->next;
            p->next = q;
            delete r;
        }
        else
        {
            p = p->next;
        }
    }
}
int main()
{
    int len;
    cin >> len;
    if (len <= 0)
    {
        return 0;
    }
    else
    {
        int* array = new int[len];
        for (int i = 0; i < len; i++)
        {
            cin >> array[i];
        }
        LinkList<int> L1(array, len);

        L1.DeleteRe();
        L1.PrintList();
        return 0;
    }
}

参考
数据结构对单链表进行数据排序 http://bbs.csdn.net/topics/392201633

我觉得没什么问题，可能是长度为0的时候没输出empty