#include <bits/stdc++.h>

using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m;
vector<vector<int>> a(50001,vector<int>());
bool viz[50001];
vector<int> sortare;

void Citire()
{
    int x,y;
    f>>n>>m;
    for(int i=1;i<=m;++i)
    {
        f>>x>>y;
        a[x].push_back(y);
    }
}

void DFS(int nod)
{
    viz[nod] = true;
    for(vector<int>::iterator it=a[nod].begin();it!=a[nod].end();++it)
        if(!viz[*it]) DFS(*it);
    sortare.push_back(nod);
}

void Afisare()
{
    for(vector<int>::reverse_iterator it=sortare.rbegin();it!=sortare.rend();++it)
        g<<*it<<" ";
}

int main()
{
    Citire();
    for(int i=1;i<=n;++i)
        if(!viz[i]) DFS(i);
    Afisare();
    return 0;
}