#include <fstream>
#include <vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int> v[50001];
int sel[50001],of[50001],nr;
void df(int x)
{
    int i;
    sel[x]=1;
    for (i=0;i<v[x].size();i++)
    {
        if (sel[v[x][i]]==0)
        {
            df(v[x][i]);
        }
    }
    of[++nr]=x;
}
int i,x,y;
int main()
{
    int n,m;
    f>>n>>m;
    for (i=1;i<=m;i++)
    {
        f>>x>>y;
        v[x].push_back(y);
    }
    for (i=1;i<=n;i++)
    {
        if (sel[i]==0)
        {
            df(i);
        }
    }
    for (int i=nr;i>=1;i--)
    {
        g<<of[i]<<" ";
    }
    return 0;
}