#include <bits/stdc++.h>
#define NMAX 50009

using namespace std;

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

int n,m,contsol,sol[NMAX];
struct nodd
{
    int nrparinti;
    vector <int> copii;
}nod[NMAX];

int main()
{
    int i,j,a,b;
    bool ok;
    fin>>n>>m;
    for(i=1; i<=m; i++)
    {
        fin>>a>>b;
        nod[a].copii.push_back(b);
        nod[b].nrparinti++;
    }

    for(i=1;i<=n;i++)
        if(nod[i].nrparinti==0)
        sol[++contsol]=i;
    for(i=1;i<=n;i++)
        for(j=0;j<nod[sol[i]].copii.size();j++)
    {
        nod[nod[sol[i]].copii[j]].nrparinti--;
        if(nod[nod[sol[i]].copii[j]].nrparinti==0)
            sol[++contsol]=nod[sol[i]].copii[j];
    }

    for(i=1; i<=n; i++)
        fout<<sol[i]<<' ';

    return 0;
}