#include <iostream>
#include <fstream>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int k,viz[50001],n,m,v[50001];
struct nod
{
    int inf;
    nod *urm;
}*l[50001];
void creare(int x,nod *&p)
{
    nod *c=new nod;
    c->inf=x;
    c->urm=p;
    p=c;
}
void adaug()
{
    int x,y;
    f>>n>>m;
    for(int i=1;i<=m;i++)
    {
        f>>x>>y;
        creare(y,l[x]);
    }
}
void df(int i)
{
    nod *c; viz[i]=1;
    for(c=l[i];c;c=c->urm)
        if(!viz[c->inf]) df(c->inf);
    v[++k]=i;
}
int main()
{
    adaug();
    for(int i=1;i<=n;i++)
        if(!viz[i])df(i);
    for(int i=n;i>=1;i--)
        g<<v[i]<<" ";
    return 0;
}