#include <fstream>
#include <vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
const int Max = 50000 + 1;
vector<int>G[Max];
vector<bool>viz(Max, false);
vector<int>lista;
void dfs(int start) {
    viz[start] = true;
    for (auto i : G[start])
        if (!viz[i]) {
            dfs(i);
        }
    lista.push_back(start);
}
int main() {
    int n, m;
    f >> n >> m;
    for (int i = 1; i <= m; ++i) {
        int x, y;
        f >> x >> y;
        G[x].push_back(y);
    }
    for (int i = 1; i <= n; ++i)
        if (!viz[i])
            dfs(i);
    for (int i = lista.size() - 1; i >= 0; --i)
        g << lista[i] << " ";
    return 0;
}