#include <bits/stdc++.h>
using namespace std;

const int nmax = 1e6 + 1;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int n, m, nod;
vector <int> v[100005];
queue <int > q;
int check[nmax];
int verif[nmax];
int main()
{
    fin >> n >> m;
    for(int i = 1; i <= m; ++i)
    {
        int x, y;
        fin >> x >> y;
        v[x].push_back(y);
        check[y] ++;
    }
    for(int i = 1; i <= n; ++i)
    {
        if(check[i] == 0)
            q.push(i);
    }
    while(!q.empty())
    {
        nod = q.front();
        fout << nod << " ";
        q.pop();
        for(int i = 0; i < v[nod].size(); ++i)
        {
            check[v[nod][i]] -- ;
            if(check[v[nod][i]] == 0)
                q.push(v[nod][i]);
        }
    }
    return 0;
}