#include<iostream>
#include<string>
using namespace std;

class cnode
{
public:
	int info;
	cnode *pnext;
};

class clist
{
public:
	cnode *phead=NULL;
	cnode *ptail;

	clist()
	{
		phead = NULL;
		ptail = NULL;
	}

	~clist()
	{
		cnode *ptrav = phead;
		while (ptrav != NULL)
		{
			phead = phead->pnext;
			delete ptrav;
			ptrav = phead;
		}
	}

	void Attach(cnode *pnn)
	{
		if (phead == NULL)
		{
			phead = pnn;
			ptail = pnn;
		}
		else
		{
			ptail->pnext = pnn;
			ptail = pnn;
		}
	}

	/*void sortAttach(cnode *pnn)
	{
		cnode *pB = NULL;
		if (phead == NULL)
		{
			phead=pnn;
		}
		else
		{
			cnode *ptrav = phead;
			while (ptrav != NULL)
			{
				if (ptrav->info < pnn->info)
				{
					break;
				}
				pB = ptrav;
				ptrav = ptrav->pnext;
			}
			if (ptrav != NULL)
			{
				if (pB != NULL)
				{
					pB->pnext = pnn;
					pnn->pnext = ptrav;
				}
				else
				{
					pnn->pnext = ptrav;
					phead = pnn;
				}
			}
			else
			{
				pB->pnext = pnn;
				pnn->pnext = NULL;
			}
		}
	}*/

};



int main()
{
	clist l;
		cnode *pnn, *sahm;
	int c = 0;

		pnn = new cnode;
		pnn->info = 15;
		pnn->pnext=NULL;
		l.Attach(pnn);

		pnn = new cnode;
		pnn->info = 25;
		pnn->pnext = NULL;
		l.Attach(pnn);

		pnn = new cnode;
		pnn->info = 50;
		pnn->pnext = NULL;
		l.Attach(pnn);

		pnn = new cnode;
		pnn->info = 40;
		pnn->pnext = NULL;
		l.Attach(pnn);

		pnn = new cnode;
		pnn->info = 60;
		pnn->pnext = NULL;
		l.Attach(pnn);

		pnn = new cnode;
		pnn->info = 20;
		pnn->pnext = NULL;
		l.Attach(pnn);

		pnn = new cnode;
		pnn->info = 300;
		pnn->pnext = NULL;
		l.Attach(pnn);

		pnn = new cnode;
		pnn->info = 490;
		pnn->pnext = NULL;
		l.Attach(pnn);

/////////////////////////////////


		int n;
		cout << "da5al teez" << endl;
		cin >> n; int total = 0;
		sahm = l.phead;

		while (sahm->pnext != NULL )
		{
			if (sahm->info == n)
			{
				break;
			}
			sahm = sahm->pnext;
			c++;
		}
		sahm =l.phead;
		int i = 0;
		while (i<c)
		{
			if (i >= c - 3)
			{
				total += sahm->info;
			}
			sahm=sahm->pnext;
			i++;
		}
		sahm = sahm->pnext;
		 i = 0;
		while ( i < 3 )
		{
			total += sahm->info;
			sahm = sahm->pnext;
			i++;
		}
		cout << "total= " << total<<endl;


	system("pause");

}