#include<fstream>
#include<vector>
using namespace std;
vector <int> v[100100];
bool viz[100100];
int sol[100100];
int n,nr=1;
void citire()
{
	int i,x,y,m;
	ifstream in("sortaret.in");
	in>>n>>m;
	for(i=0;i<m;i++)
		{in>>x>>y;
		v[x].push_back(y);
		}
}
void DFS(int nod)
{
int m=v[nod].size(),i;
viz[nod]=1;
for(i=0;i<m;i++)
	if(!viz[v[nod][i]])
		DFS(v[nod][i]);
sol[nr++]=nod;
}
int main()
{
	int i;
	citire();
	for(i=1;i<=n;i++)
		if(!viz[i])
			DFS(i);
	ofstream out("sortaret.out");
	for(i=n;i>0;i--)
		out<<sol[i]<<" ";
	out<<'\n';
	out.close();
	return 0;
}