#include <bits/stdc++.h>

using namespace std;

vector <int> L[100001];
int indeg[100001];

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int main()
{
    int n, m;
    fin >> n >> m;
    for (int i = 1; i <= m; i++)
    {
        int x, y;
        fin >> x >> y;
        L[x].push_back(y);
        indeg[y]++;
    }
    priority_queue <int, vector<int>, greater<int>> q;
    for (int i = 1; i <= n; i++)
        if (indeg[i] == 0)
            q.push(i);
    while (!q.empty())
    {
        int curr = q.top();
        cout << curr << " ";
        q.pop();
        for (auto next : L[curr])
        {
            indeg[next]--;
            if (indeg[next] == 0)
                q.push(next);
        }
    }
    return 0;
}