define _CRT_SECURE_NO_WARNI NGS include iostream include iomanip inclu

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <cmath>
#include <algorithm>
#include <vector>
#define vd  vector<double> 
#define vvd vector<vector<double> > 
#define ui unsigned int

using namespace std;

vvd a;
vvd b;
vd temp;
int n;
double eps = 1e-6;

vd operator /( vd a, double num)
{
	vd rez;
	rez.resize(a.size());
	for (int i = 0; i < a.size(); ++i) {
		rez[i] = a[i] /num;
	}
	return rez;
}

vd operator -( vd a, vd b)
{
	vd rez;
	rez.resize(a.size());
	for (int i = 0; i < a.size(); ++i) {
		rez[i] = a[i] - b[i];
	}
	return rez;
}

vd operator *( vd a, double num)
{
	vd rez;
	rez.resize(a.size());
	for (int i = 0; i < a.size(); ++i) {
		rez[i] = a[i] * num;
	}
	return rez;
}



int main ()
{
  freopen("input.txt", "r", stdin);
  cin >> n;
  a.resize(n, vd(n));

	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < n ; ++j) {
			cin >> a[i][j];
		}
	}
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < n ; ++j) {
			cout << a[i][j] <<" ";
		}
		cout << endl;
	}

		
	for (int N = 0; N < n; ++N) {
		for (int j = N; j < n; ++j) {
			for (int i = N; i < n ; ++i) {
				if (fabs(a[i][j]) > eps)
				{
					if (fabs(a[N][j]) < eps)
					{
						temp = a[N];
						a[N] = a[i];
						a[i] = temp;
					}
					a[N] = a[N]/a[N][N];

					for (int k = N + 1; k < n; ++k)
					{
						a[k] = a[k] - a[N]*a[k][N];
					}
					}
				}
			}
	}
	
	
		for (int i = 0; i < n; ++i) {
		for (int j = 0; j < n ; ++j) {
			cout << a[i][j] <<" ";
		}
		cout << endl;
		}

		for (int M = n - 1; M > 0; --M)
		{
		for (int s = M - 1; s >= 0; --s)
		{
			a[s] = a[s] - a[M] * a[s][M];
		}

		}
		for (int i = 0; i < n; ++i) {
		for (int j = 0; j < n ; ++j) {
			cout << a[i][j] <<" ";
			
		}
		cout << endl;
		}
}