#include <fstream>
#define N 100002
#include <vector>

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

vector <int>graph[N];
int grad[N],c[N];

void sortaret(int ps, int pi)
{
    int nod;
    while(ps<=pi)
    {
        nod=c[ps++];
        g<<nod<<' ';
        for(int i=0;i<graph[nod].size();++i)
        {
            --grad[graph[nod][i]];
            if(!grad[graph[nod][i]])///gradul tot scade si atunci o singura data va ajunge sa fie 0
                c[++pi]=graph[nod][i];
        }
    }
}
int main()
{
    int n,m,x,y,ps=1,pi=0;
    f>>n>>m;
    for(int i=1;i<=m;++i)
    {
        f>>x>>y;
        graph[x].push_back(y);
        ++grad[y];
    }
    for(int i=1;i<=n;++i)
        if(!grad[i]) c[++pi]=i;
    sortaret(1,pi);
    f.close();
    g.close();
    return 0;
}