package?com.yjb;

import?java.io.*;
import?java.util.StringTokenizer;

public?class?Test?{
	private?int?N;
	private?double[][]?src;
	private?double[][]?result;

	public?Test（）?{

	}

	public?static?void?main（String[]?args）?throws?Exception?{
		new?Test（）.exec（）;
	}

	private?void?exec（）?throws?Exception?{
		BufferedReader?reader?=?new?BufferedReader（new?InputStreamReader（
				System.in））;
		System.out.print（“Input???N:?“）;
		System.out.flush（）;
		String?line?=?reader.readLine（）;
		N?=?Integer.parseInt（line）;

		src?=?new?double[N][];
		result?=?new?double[N][];

		for?（int?i?=?0;?i?			line?=?reader.readLine（）;
			//System.out.println（line）;
			src[i]?=?new?double[N];
			result[i]?=?new?double[N];
			result[i][i]?=?1;

			StringTokenizer?st?=?new?StringTokenizer（line?““）;
			int?index?=?0;
			while?（st.hasMoreTokens（））?{
				src[i][index]?=?Double.parseDouble（st.nextToken（））;
				//System.out.println（src[i][index]）;
				index++;
			}
		}
		reader.close（）;
		for?（int?i?=?0;?i?			for?（int?j?=?0;?j?				System.out.print（src[i][j]?+?“?“）;
			}
			System.out.print（“\t?“）;
			for?（int?j?=?0;?j?				System.out.print（result[i][j]?+?“?“）;
			}
			System.out.println（）;
		}
		
		calCol（0）;
		calColBack（N?-?1）;
		reInit（）;
		

		for?（int?i?=?0;?i?			for?（int?j?=?0;?j?				System.out.print（src[i][j]?+?“?“）;
			}
			System.out.print（“\t?“）;
			for?（int?j?=?0;?j?				System.out.print（result[i][j]?+?“?“）;
			}
			System.out.println（）;
		}
	}

	private?void?reInit（）?{
		for?（int?i?=?0;?i?			double?coefficient?=?1?/?src[i][i];
			src[i][i]?=?1;
			for?（int?j?=?0;?j?				result[i][j]?*=?coefficient;
		}
	}

	p