#include<stdio.h>
int v[16][16],m,n,i,j;
void inm_linia(){
	int s;
	s=0;
	for (j=0;j<m;++j){
		s=s+v[i][j];
	}
	if (s<0){
		for (i=0;i<n;++i)
			v[i][j]=v[i][j]*(-1);
	}
}
void inm_coloana(){
	int s;
	s=0;
	for (j=0;j<m;++j){
		s=s+v[j][i];
	}
	if (s<0){
		for (j=0;j<n;++j)
			v[j][i]=v[j][i]*(-1);
	}
}

int main(){
	freopen("flip.in","r",stdin);
	freopen("flip.out","w",stdout);
	scanf("%d %d",&n,&m);
	for (i=0;i<n;++i)
		inm_linia();
	for (i=0;i<m;++i)
		inm_coloana();
	for (i=0;i<n;++i){
		for (j=0;i<m;++j)
			printf("%d ",&v[i][j]);
		printf("\n");
	}
	fclose(stdin);
	fclose(stdout);
	return 0;
}