#include <bits/stdc++.h>

using namespace std;

int n, m, t[50003], k;
bool viz[50003];
vector <int>a[50003];

inline void Citire()
{
    int i, x, y;
    ifstream fin("sortaret.in");
    fin >> n >> m;
    for(i = 1; i <= m; ++i)
    {
        fin >> x >> y;
        a[x].push_back(y);
    }
    fin.close();
}

inline void DFS(int x)
{
    int y;
    unsigned int i;
    viz[x] = true;
    for(i = 0; i < a[x].size(); ++i)
    {
        y = a[x][i];
        if(!viz[y])
            DFS(y);
    }
    t[++k] = x;
}

int main()
{
    Citire();
    int i;
    for(i = 1; i <= n; ++i)
        if(!viz[i])
            DFS(i);
    ofstream fout("sortaret.out");
    for(i = k; i >= 1; --i)
        fout << t[i] <<" ";
    cout << "\n";
    fout.close();

    return 0;
}