#include <fstream>
#include <vector>

using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

vector <int> a[50001];
vector <int> sta;
bool viz[50001];
int n;

void df(int nod)
{
    viz[nod]=1;
    int nr=a[nod].size();
    for(int i=0;i<nr;++i)
        if(!viz[a[nod][i]])
        df(a[nod][i]);
    sta.push_back(nod);
}

int main()
{
    int m;
    fin>>n>>m;
    for(int i=1;i<=m;++i)
    {
        int x,y;
        fin>>x>>y;
        a[x].push_back(y);
    }
    for(int i=1;i<=n;++i)
        if(viz[i]==0)
        df(i);
    for(int i=sta.size()-1;i>=0;i--)
        fout<<sta[i]<<" ";
    return 0;
}