#include <stdio.h>
#include <assert.h>

#define TRUE 1
#define FALSE 0
#define MAX 100

int main()
{
  double M[MAX][MAX];
  int n, i, j;
  int acheidiferentes; /*encontrou elemento distinto do transposto*/

  scanf("%d", &n);
  assert( n <= MAX );

  for (i = 0; i < n; i++)
    for (j = 0; j < n; j++)
      scanf("%lf", &M[i][j]);

  acheidiferentes = FALSE;
  for ( i = 0; i < n; i++ )
    for ( j = i + 1; j < n; j++ )
      if ( M[i][j] != M[j][i] )
	acheidiferentes = TRUE;

  if (acheidiferentes == FALSE) printf("A matriz eh simetrica.\n");
  else printf("A matriz NAO eh simetrica.\n");

  return 0;
}