// Author Antonio-Gabriel Sturzu

#include<stdio.h>
#include<stdlib.h>
#include<time.h>

int main()
{
	int n,i,**mat,j;
	FILE *f=fopen("apm2.in","w");

	printf("Dati n ");
	scanf("%i",&n);

	mat=(int **) calloc(n*n,sizeof(int *));
	for(i=0;i<n;i++)
		mat[i]=(int *) calloc(n,sizeof(int));
	srand(time(NULL));

	for(i=0;i<n;i++)
	{
		for(j=i;j<n;j++)
		{
			if(i==j)
				mat[i][j]=0;
			else
			{
				mat[i][j]=mat[j][i]=(rand()%999)+1;
			}
		}
	}
	fprintf(f,"%i\n",n);
	for(i=0;i<n;i++)
	{
		for(j=0;j<n;j++)
			fprintf(f,"%i ",mat[i][j]);
		fprintf(f,"%s","\n");
	}
	fclose(f);
	for(i=0;i<n;i++)
		free(mat[i]);
	free(mat);
	return 0;
}