#include <cmath>
#include <vector>
#include <fstream>
#include <iomanip>
#include <iterator>
#define aproximation 1e-10


/*
 *
 */
using namespace std;
struct pr
{
	double first, second;
	pr( void ) { first=second=0.0; }
	pr( const double& _f, const double& _s ) : first(_f), second(_s) { }
};
inline istream& operator>>( istream& in, pr& x )
{
	in>>x.first>>x.second;
	return in;
}
inline double dis(  const pr& x, const pr& y )
{
	return ( x.first-y.first )*( x.first-y.first )+( x.second-y.second )*( x.second-y.second );
}
vector< pr > v;
int main( void )
{
	int N, i, j;
	double d=1e+25, d2;
	ifstream in( "cmap.in" );
	in>>N;
	copy( istream_iterator<pr>(in), istream_iterator<pr>(), back_inserter(v) );
	for( i=0; i < N; ++i )
		for( j=i+1; j < N; ++j )
		{
			d2=dis( v[i], v[j] );
			if( d-d2 >= aproximation )
				d=d2;
		}
	ofstream out( "cmap.out" );
	out<<setprecision(20)<<sqrt(d);
	return EXIT_SUCCESS;
}