#include<fstream>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,viz[50005];
struct nod
{
    int inf;
    nod *adr;
} *v[50005],*a;

void citire()
{
    int x,y;
    f>>n>>m;
    for(int i=1;i<=m;i++)
    {
        f>>x>>y;
        nod *p=new nod;
        p->inf=y;
        p->adr=v[x];
        v[x]=p;
    }
}
void dfs(int x)
{
    viz[x]=1;
    for(nod *p=v[x];p!=NULL;p=p->adr)
        if(viz[p->inf]==0)
            dfs(p->inf);

    nod *b=new nod;
    b->inf=x;
    b->adr=a;
    a=b;

}
void afisare()
{
    nod *p;
    for(p=a;p!=NULL;p=p->adr)
    {
        g<<p->inf<<' ';
    }
}
int main()
{
    citire();
    a=NULL;
    for(int i=1;i<=n;i++)
    {
        if(viz[i]==0)
        {
            dfs(i);
        }
    }
    afisare();
}