# include <vector>

using namespace std;

vector <int> G[500005];
vector <int>::iterator it;
int n,m,x,y,i,d[500005],Q[500005];

int main()
{
	freopen("sortaret.in","r",stdin);
	freopen("sortaret.out","w",stdout);
	scanf("%d %d", &n, &m);
	for (i=1;i<=m;i++)
	{
		scanf("%d %d", &x, &y);
		G[x].push_back(y);
		d[y]++;
	}
	for (i=1;i<=n;i++)
		if (!d[i]) Q[++Q[0]]=i;
	for (i=1;i<=n;i++)
	{
		x=Q[i];
		for (it=G[x].begin();it!=G[x].end();++it)
			{
				d[*it]--;
				if (!d[*it]) Q[++Q[0]]=*it;
			}
	}
	for (i=1;i<=n;i++)
		printf("%d ", Q[i]);
	return 0;
}