#include <bits/stdc++.h>
using namespace std;
ifstream in ("sortaret.in");
ofstream out ("sortaret.out");
vector <int> v[50001];
int grad[50001];
void solve()
{
    int n, m;
    in >> n >> m;
    for (int i = 1;i<=m;++i)
    {
        int a, b;
        in >> a >> b;
        v[a].push_back(b);
        grad[b]++;
    }
    queue <int> q;
    for (int i = 1;i<=n;++i)
        if (grad[i] == 0)
            q.push(i);
    vector <int> ans;
    while(!q.empty())
    {
        int node = q.front();
        out << node << ' ';
        for (auto vecin:v[node])
        {
            grad[vecin]--;
            if (grad[vecin]==0)
                q.push(vecin);
        }
    }
    return;
}
main ()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t = 1;
    //cin >> t;
    while (t--)
        solve();
    return 0;
}