#include<fstream>
#include<vector>
using namespace std;
int i,j,x,k,m,n,y,h,d[50001],l;
vector<int>a[50001];
bool w[50001];
vector<int>v;
void df(int x)
{
    w[x]=1;
    for(int i=0;i<d[x];++i)
    {
        int y=a[x][i];
        if(!w[y])df(y);
    }
    v.push_back(x);
}
int main()
{
    ifstream f("sortaret.in");
    f>>n>>m;
    for(i=0;i<m;++i)
    {
        f>>x>>y;
        a[x].push_back(y);
    }
    f.close();
    for(i=1;i<=n;++i)d[i]=a[i].size();
    for(l=1;l<=n;++l)
    {
        if(!w[l])df(l);
    }
    h=v.size();
    ofstream g("sortaret.out");
    for(i=h-1;i>-1;--i)g<<v[i]<<" ";
    g.close();
    return 0;
}