#include <cstdio>
#include <vector>

vector <int> g[50001], o;
int n, m, viz[50001];

void citire()
{
    int x,y;
    scanf("%d %d\n",&n,&m);
    for(int i=0;i<m;i++)
    {
        scanf("%d %d\n",&x,&y);
        g[x].push_back(y);
    }
}
void adancime(int v)
{
    for(int j=0;j<g[v].size();j++)
    {
        int q=g[v][j];
        if(!viz[q])
        {
            viz[q]=1;
            adancime(q);
        }
    }
    o.push_back(v);
}
void vizitare()
{
    for(int i=1;i<=n;i++)
    {
        if(!viz[i])
        {
            viz[i]=1;
            adancime(i);
        }
    }
}
void afisare()
{
    while(!o.empty())
    {
        printf("%d ",o.back());
        o.pop_back();
    }

}
int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    citire();
    vizitare();
    afisare();
    return 0;
}