#include <bits/stdc++.h>

using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector <int> v[50005];
int viz[50005], sol[50005];
int n, m, cnt;
inline void Citire()
{
    fin >> n >> m;
    for(int i = 1; i <= m; i ++)
    {
        int x, y;
        fin >> x >> y;
        v[x].push_back(y);
    }
}
inline void dfs(int start)
{
    viz[start] = 1;
    for(auto it : v[start])
        if(viz[it] != 1)
            dfs(it);
    sol[++cnt] = start;
}
int main()
{
    Citire();
    for(int i = 1; i <= n; i ++)
    {
        if(viz[i] != 1)
            dfs(i);
    }   
    for(int i = cnt; i >= 1; i --)
        fout << sol[i] << " ";
    return 0;
}