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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]);			}		}	}}