import java.io.*;
import java.lang.Math;

public class Main
{
	static StreamTokenizer scanner;
	static int values = 2;
	static int n;
	static double[][] m;
	static double[][] matrix;


	protected static int readInt( ) throws IOException 
	{
        scanner.nextToken( );   
    	
    	if ( scanner.ttype != StreamTokenizer.TT_NUMBER ) 
    	{
        System.err.println( scanner.lineno( ) + ": Int-Wert erwartet: "
                            + scanner.toString() );
        System.exit( 1 );
    	}
    	
    	return ( int )scanner.nval;
	} 
	
	protected static double readDouble( ) throws IOException 
	{
        scanner.nextToken( );   
    	
    	if ( scanner.ttype != StreamTokenizer.TT_NUMBER ) 
    	{
        System.err.println( scanner.lineno( ) + ": Double-Wert erwartet: "
                            + scanner.toString() );
        System.exit( 1 );
    	}
    	
    	return ( double )scanner.nval;
	} 
	
	public static void main( String args[ ] ) 
	{
	
		if ( args.length < 1 ) 
		{
        	System.out.println("Usage: java Matrix <filename>");
        	System.exit( 1 );
    	}
  
    	String line;
    	
    	try 
    	{
        	scanner = new StreamTokenizer( new BufferedReader( new FileReader( args[ 0 ] ) ) );
  
        	n = readInt( );
        	
        	m = new double[ n+1 ][ values ];
        	
        	for( int i = 0; i < n; i++ ) 
        	{
            	for( int j = 0; j < values; j++)
            	{
            	   	m[ i ][ j ] = readDouble( );
            	}
            } 
  			
  			for(int i=0; i<n; i++)
			{
				for(int j=0; j<2; j++)
				{
					System.out.println("matrix["+i+"]"+"["+j+"]"+m[i][j]);
				}
			}
  			mathLength();
        	
    	} 
    
    	catch ( FileNotFoundException e ) 
    	{
        	System.err.println( "File " + args[ 0 ] + " not found" );
        	e.printStackTrace( );
        	System.exit( 1 );
    	} 
    
    	catch ( NumberFormatException e ) 
    	{
        	System.err.println( "Value not convetable into int: " + e );
        	e.printStackTrace( );
        	System.exit( 1 );
    	} 
    
    	catch ( IOException e ) 
    	{
        	System.err.println( "IO Error: " + e );
        	e.printStackTrace( );
        	System.exit( 1 );
    	}
	}
	
	public static void mathLength()
	{
		matrix = new double[n][n];
		
		for(int x=0; x < n; n++ )
		{
			for(int y=0; y < 1; y++)
			{
				double v = m[x][y];
				double w = m[x][y+1];
				
				for(int i=0; i < n; i++)
				{
					for(int j = 0; j < 1; j++)
					{
						double erg = Math.sqrt(Math.pow( (m[i][j] - v),2) - Math.pow( (m[i][j+1] - w),2));
						matrix[x][i] = erg;
					}
				}
			}
		}
		
		for(int i=0; i<n; i++)
		{
			for(int j=0; j<n; j++)
			{
				System.out.println("matrix: "+matrix[i][j]);
			}
		}
	}
}