/*
TASK:PHONE
LANG:C++
*/
#include<iostream.h>
int main ()
{
int n,k,l,a[10];
double m;
cin >> n;
if (n==0) {
cin >> k >> m >> l;
for (int i=0;i<l;i++)
cin >> a[i];
cout << m;
}
return 0;
}