#include <fstream>

using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int n,m,viz[100002],d[100002];
struct nod
{
    int v;
    nod *urm;
};
nod *L[100002], *p;
int coada[100002];

int i,x,y,c,pr,ul;

int main()
{
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        p=new nod;
        p->v=y;
        p->urm=L[x];
        L[x]=p;
        d[y]++;
    }
    for(i=1;i<=n;i++)
    {
        viz[i]=0;
    }
    pr=1;
    ul=0;
    for(i=1;i<=n;i++)
    {
        if(d[i]==0)
        {
            ul++;
            coada[ul]=i;
            viz[i]=1;
            fout<<i<<" ";
        }
    }
    while(pr<=ul)
    {
        x=coada[pr];
        for(p=L[x];p!=0;p=p->urm)
        {
            y=p->v;
            d[y]--;
            if(d[y]==0 && viz[y]==0)
            {
                fout<<y<<" ";
                viz[y]=1;
                ul++;
                coada[ul]=y;
            }
        }
        pr++;
    }
    return 0;
}