#include <stdio.h>

int main()
{
  int n, i=0;

  scanf("%d", &n);

  while (i*(i+1)*(i+2)<n)
    i++;

  if (i*(i+1)*(i+2)==n)
    printf("%d 'e triangular: %d = %d * %d * %d\n",
	   n, n, i, i+1, i+2);
  else {
    printf("%d nao 'e triangular:\n", n);
    printf("   %d * %d * %d = %d < %d\n",
	   i-1, i, i+1, (i-1)*i*(i+1), n);
    printf("   %d * %d * %d = %d > %d\n",
	   i, i+1, i+2, i*(i+1)*(i+2), n);
  }
  
  return 0;
}