using namespace std;
int n,a[200010];
int bef,q;
bool b[200010];
int main()
{
	freopen("fruit.in","r",stdin);
	freopen("fruit.out","w",stdout);
	scanf("%d",&n);
	for(int i=1;i<=n;i++) scanf("%d",&a[i]);
	q=n;
	while(q>1)
	{
		for(int i=1;i<=n;i++) 
		{
			if(a[i]!=bef&&!b[i]) 
			{
				bef=a[i];
				b[i]=1;
				printf("%d ",i);
				q--;
			}
		}
		printf("\n");
	}
	for(int i=1;i<=n;i++)
	  if(!b[i]) 
	    printf("%d",i);
	fclose(stdin);
	fclose(stdout);
	return 0;
}```