// ConsoleApplication2.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <fstream>
#include <vector>

using namespace std;

ifstream cin("sortaret.in");
ofstream cout("sortaret.out");

int n, m;
vector <int> mat[50001];
int viz[50001];
vector <int> sol;

void dfs(int nod) 
{
	viz[nod] = 1;
    for (int i = 0; i < mat[nod].size(); i++) 
    {
        if (!viz[mat[nod][i]]) 
        {
			dfs(mat[nod][i]);
		}
	}
    sol.push_back(nod);
}

void sortare_topologica()
{
    for (int i = 1; i <= n; i++)
    {
        if (!viz[i])
        {
			dfs(i);
		}
	}
    for (int i = sol.size()-1; i >=0; i--)
    {
		cout << sol[i] << " ";
	}
}

int main() {
    int x, y;
    cin >> n >> m;
    for (int i = 1; i <= m; i++) 
    {
		cin >> x >> y;
        mat[x].push_back(y);
	}
    sortare_topologica();
    return 0;
}