#include <iostream>
#include <fstream>
#include <queue>

using namespace std;

int q[50005], gi[50005];
vector <int> mat[50005];

int main()
{
    //ifstream in ("date.in");/*
    ifstream in ("muzeu.in");
    ofstream out ("muzeu.out");//*/

    int n, m, x, y, i;
    vector <int> :: iterator it, fit;
    in >> n >> m;
    for (i = 0; i < m; ++i) {
        in >> x >> y;
        ++gi[y];
        mat[x].push_back(y);
    }

    for (i = 1;  i <= n; ++i) {
        if (gi[i] == 0) {
            q[++q[0]] = i;
        }
    }
    i = 1;
    while (i <= q[0]) {
        out << q[i] << " ";
        it = mat[q[i]].begin();
        fit = mat[q[i]].end();
        while (it != fit) {
            if ((--gi[*it]) == 0) {q[++q[0]] = *it;}
            ++it;
        }
        ++i;
    }
    return 0;
}