#include <fstream>
#include <vector>

using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");

const int nmax = 50005;

int n,m,x,y,i;
vector <int> v[nmax];
bool viz[nmax];

void DF(int x)
{
    viz[x] = 1;
    for (auto it:v[x])
        if (!viz[it])
            DF(it);
    g<<x<<" ";
}

int main()
{
    f>>n>>m;
    for (i=1;i<=m;i++)
    {
        f>>x>>y;
        //v[x].push_back(y);
        v[y].push_back(x);
    }
    for (i=1;i<=n;i++)
        if (!viz[i])
            DF(i);
    return 0;
}