#include <bits/stdc++.h>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector <int> G[100001];
vector <int> L;
int n , m , x , y , v[100001];
void dfs(int nod)
{
    fout << nod << " ";
    v[nod] = 1;
    for(auto i : G[nod])
        if(!v[i]) v[i] = 1 , dfs(i);
}
int main()
{
    fin >> n >> m;
    for(int i = 1 ; i <= m ; i++)
    {
        fin >> x >> y;
        G[x].push_back(y);
    }
    for(int i = 1 ; i <= n ; i++)
        if(!v[i]) dfs(i);
}