#include <iostream>
using namespace std;
int nrcif (int n)
{
int c = 0;
do
{
n /= 10;
c++;
}
while (n);
return c;
}
int main()
{
int n, i;
cin >> n;
int c = nrcif(n);
for (i = 1; i <= c / 2; i++)
n /= 10;
cout << n % 10;
return 0;
}