#include <fstream>
#include <vector>

using namespace std;

vector <long int > v[50005];
long int n,m,x,y,viz[50005],nr,vec[50005],i;

inline void df(long int x)
{
    long int i;
    viz[x]=1;
    for (i=0;i<v[x].size();i++)
    if (viz[v[x][i]]==0) df(v[x][i]);
    nr++;
    vec[nr]=x;
}

int main()
{
   ifstream f("sortaret.in");
   ofstream g("sortaret.out");
   f>>n>>m;
   for (i=1;i<=m;i++) {
       f>>x>>y;
       v[x].push_back(y);
   }

   for (i=1;i<=n;i++)
   if (viz[i]==0) df(i);

   for (i=nr;i>=1;--i)
   g<<vec[i]<<' ';

   f.close();
   g.close();
    return 0;
}