#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#define MAX 50005
using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");

vector <vector<int> > G(MAX);
vector <int> viz(MAX);
int n, m;
int postordine[MAX], nr;
queue <int> q;
void DFS(int s)
{
    viz[s] = 1;
    q.push(s);
    for (auto i: G[s])
    {
        if (!viz[i])
        {

            DFS(i);
        }
    }
    postordine[++nr] = s;
}
int main()
{
    f >> n >> m;

    for (int i = 1; i <= m; i++)
    {
        int x, y;

        f >> x >> y;
        G[x].push_back(y);
    }
    for (int i = 1; i <= n; i++)
        if (!viz[i])
            DFS(i);

for (int i = n; i > 0; i--)
    g << postordine[i] << " ";

    return 0;
}