#include <iostream>
#include <fstream>
#include <vector>
#include <stack>
#define lim 100004
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int> muc[lim];
stack <int> stec;
int n,m,x,y;
int viz[lim];
void dfs (int nod)
{
	viz[nod]=1;
	for (int i=0;i<muc[nod].size();i++)
		if (viz[muc[nod][i]]==0)
		{
			dfs(muc[nod][i]);
		}
	stec.push(nod);
}
int main()
{
	f>>n>>m;
	for (int i=1;i<=m;i++)
	{
		f>>x>>y;
		muc[x].push_back(y);
	}
	for (int i=1;i<=n;i++)
		if (viz[i]==0) dfs(i);
	while (!stec.empty())
	{
		g<<stec.top()<<" ";
		stec.pop();
	}
	f.close();
	g.close();
	return 0;
}