#include <fstream>
//#include <iostream>
#include <string>

	using namespace std;

string deletenull( string value )
{
	size_t len_str_value = value.size();

	int index = 0;

	for( int i = 0; i < len_str_value; i++ )
	{
		if( value[ i ] == '0' )
		{
			index++;

		} else break;
	}

	value.erase( 0, index );

	return value;
};

string max( string value1, string value2 )
{
	if( value1[ 0 ] == '0' )
	{
		value1 = deletenull( value1 );
	}

	if( value2[ 0 ] == '0' )
	{
		value2 = deletenull( value2 );
	}

	size_t len_str_value1 = value1.size();
	size_t len_str_value2 = value2.size();

	if( len_str_value1 > len_str_value2 )
	{
		return value1;
	}
	else if( len_str_value1 < len_str_value2 )
	{
		return value2;
	}
	else
	{
		for( int i = 0; i < len_str_value1; i++ )
		{
			if( value1[ i ] < value2[ i ] )
			{
				return value2;
			}
			else
			{
				return value1;
			}
		}
	}

	return " ";
};

void main()
{
	ifstream if_file("input.txt");
	ofstream of_file("output.txt");

	string buffer[3];

	int tmp = 0, index = 0;

	while( !if_file.eof() && index < 3)
	{
		if_file>>buffer[ index++ ];
	}

	if( index == 2 ) {
		return;
	}

	of_file<< max( max( buffer[0] , buffer[1] ), buffer[2] ) <<endl;

	if_file.close();
	of_file.close();

//	cin.get();
};

		bool more = false;

		for( int i = 0; i < len_str_value1; i++ )
		{
			if( value1[ i ] < value2[ i ] )
			{
				more = true;
			}
			else
			{
				more = false;
			}
		}

		if( more )
			return value2;
		else
			return value1;