#include<fstream>
using namespace std;
struct nod{int info; nod *adr;} *v[50002],*p,*q;
int n,m,i,x,y,grd[50002],c[50002];
ofstream g("sortaret.out");
void sortaret()
{int u=0,p=1;
	for(i=1;i<=n;i++) if(grd[i]==0) c[++u]=i; //grd 0 le gab in coada
	while(p<=u)
	{g<<c[p]<<" ";
		q=v[c[p]];
		while(q)
		{
			grd[q->info]--;
			if(grd[q->info]==0) c[++u]=q->info; 
			q=q->adr;
		}
		p++;
	}
}
int main()
{
	ifstream f("sortaret.in");
	f>>n>>m;
	for(i=1;i<=m;i++)
	{
		f>>x>>y;
		p=new nod; p->info=y; p->adr=v[x]; grd[y]++; v[x]=p;
	}
	sortaret();
	f.close();g.close();
return 0;}