#include <fstream>
#include <vector>
#include <deque>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector<int> v[100010];
deque<int> q;
int i,n,m,x,y,q1,w[100010],viz[100010];
int main()
{
    f>>n>>m;
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        v[x].push_back(y);
        w[y]++;
    }
    for(i=1;i<=n;i++)
        if(w[i]==0)
            q.push_back(i);
    while(q.size())
    {
        g<<q.back()<<' ';viz[q.back()]=1;
        for(auto it:v[q.back()])
        {
            w[it]--;
            if(w[it]==0)
                q.push_front(it);
        }
        q.pop_back();
    }
    for(i=1;i<=n;i++)
        if(viz[i]==0)
            g<<i<<' ';
    return 0;
}