#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;
ifstream in ("date.in");

struct nod
{
	char nume[30];
	float medie;
	nod *st, *dr;
}*rad;

char bla[30];

void creare ()
{
	int n, i;
	in>>n;
	nod *p, *q;
	bool gasit=0;
	p=new nod;
	rad=p;
	rad->st = NULL;
	rad->dr = NULL;
	in>>rad->nume;
	in>>rad->medie;
	for (i=1; i<n; i++)
	{
		p=new nod;
		in>>p->nume>>p->medie;
		p->st=NULL;
		p->dr=NULL;
		q=rad;
		gasit=false;
		while (!gasit)
		{
			if (strcmp(q->nume,p->nume)>0)
				if (q->st==NULL)
				{
					q->st=p;
					gasit=true;
				}
				else
					q=q->st;
			else
				if (q->dr==NULL)
				{
					q->dr=p;
					gasit=true;
				}
				else
					q=q->dr;
		}
	}
}

void inordine (nod *cnt)
{
	if (cnt!=NULL)
	{
		inordine(cnt->st);
		if(strcmp(cnt->nume, bla)==0)
			cout<<cnt->medie;
		inordine(cnt->dr);
	}

}



int main ()
{
	cin>>bla;
	creare ();
	inordine(rad);

	return 0;
}