#include <fstream>
#include <set>
#include <queue>
#include <vector>
using namespace std;
ifstream fin ("sortaret.in");
ofstream fout ("sortaret.out");


queue<int> q;
vector<vector<int>> graf;
vector<int> linie,nr_noduri,sir_final;

int main()
{
    ios_base::sync_with_stdio(false);
    int n,m,i,j,k,x;
    fin>>n>>m;
    for(i=0;i<=n;i++)
    {
        graf.push_back(linie);
        nr_noduri.push_back(0);
    }

    for(i=0;i<m;i++)
    {
        fin>>j>>k;
        graf[j].push_back(k);
        nr_noduri[k]++;
    }
    for(i=1;i<=n;i++)
        if(nr_noduri[i]==0)
            {
                q.push(i);
                nr_noduri[i]=-1;
            }

    while(!q.empty())
    {
        x=q.front();
        q.pop();
        sir_final.push_back(x);
        for(i=0;i<graf[x].size();i++)
        {
            if(nr_noduri[graf[x][i]]==1)
                {
                    q.push(graf[x][i]);
                    nr_noduri[graf[x][i]]=-1;
                }
            else
                nr_noduri[graf[x][i]]--;
        }
    }
    for(i=0;i<n;i++)
        fout<<sir_final[i]<<' ';

    fout<<'\n';

    return 0;
}