#include <fstream>
#include <vector>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");

#define MAXN 50005
vector<int> graf[MAXN];
vector<int> rasp;
int n,m,x,y,i;
bool fol[MAXN];

void sortaret(int nod)
{
    for(int i=0; i<graf[nod].size(); i++)
        if(!fol[graf[nod][i]])
        {
            fol[graf[nod][i]] = true;
            sortaret(graf[nod][i]);
        }
    rasp.push_back(nod);
}

int main()
{
    cin>>n>>m;
    for(i=1; i<=m; i++)
    {
        cin>>x>>y;
        graf[x].push_back(y);
    }
    for(i=1; i<=n; i++)
        if(!fol[i])
            sortaret(i);

    for(i=rasp.size()-1; i>=0; i--)
        cout<<rasp[i]<<" ";
    return 0;
}