#include <fstream>
#include <iostream>
#include <vector>
using namespace std;

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

int n, m, v[50002];
vector <int> a[50002];
bool marcat [50002];

void citire ()
{
    int x, y;
    in >> n >> m;
    while (m--)
    {
        in >> x >> y;
        a[x].push_back(y);
    }
}

void dfs (int x)
{
    marcat[x] = true;
    for (size_t i = 0; i < a[x].size(); ++i)
    {
        if (!marcat[a[x][i]])
        {
            dfs(a[x][i]);
        }
    }

    v[++v[0]] = x;
}

int main ()
{
    citire ();
    for (int i = 1; i <= n; ++i)
    {
        if (!marcat[i])
        {
            dfs(i);
        }
    }
    for (int i = n; i >= 1; --i)
    {
        out << v[i] << ' ';
    }
    out << '\n';
    return 0;
}