#include <iostream>
using namespace std;
 
int main() {
	int n,m;
	cin >> n >> m;
	double A[n][m];
	for (int i = 0; i < n; i++){
		for (int j = 0; j < m; j++)
			cin >> A[i][j];
	}
	for (int i = 0; i < n; i++){
		for (int j = 0; j < m; j++)
			if (A[i][j]!=0){
				A[i][j]=-(1/A[i][j]);
			}
	}	
	for (int i = 0; i < n; i++){
		for(int j = 0; j < m; j++)
			cout << A[i][j] << "\t";
			cout << endl;
	}
	return 0;
}