#include<cstdio>
#include<vector>
#define nmax 50005
using namespace std;
int n,m;
vector <int> a[nmax];
bool use[nmax];
void DF(int nod)
{
	vector <int> ::iterator it;
	use[nod]=1;
	for(it=a[nod].begin();it!=a[nod].end();it++)
		if(!use[*it])
			DF(*it);
	a[0].push_back(nod);
}
int main()
{
	vector <int> ::iterator it;
	freopen("sortaret.in","r",stdin);
	freopen("sortaret.out","w",stdout);
	scanf("%d %d",&n,&m);
	int i,x,y;
	for(i=1;i<=m;i++)
	{
		scanf("%d %d",&x,&y);
		a[x].push_back(y);
	}
	for(i=1;i<=n;i++)
		if(!use[i])
			DF(i);
	for(it=a[0].end()-1;it!=a[0].begin();it--)
		printf("%d ",*it);
	printf("%d\n",*it);
	return 0;
}