#include <fstream>
#include <vector>
#include <queue>

using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");

#define NMAX 50005

int n, m, vec[NMAX], nrvec;
bool viz[NMAX];
vector<int> G[NMAX];

void citire() {
    f >> n >> m;
    int x, y;
    for (int i = 1; i <= m; ++i) {
        f >> x >> y;
        G[x].push_back(y);
    }
}

void vizitare_nod(int x) {
    viz[x] = true;
    for (auto &nod: G[x])
        if (!viz[nod])
            vizitare_nod(nod);
    vec[++nrvec] = x;
}

void sortare() {
    for (int i = 1; i <= n; i++)
        if (!viz[i])
            vizitare_nod(i);
}

void afisare() {
    for (int i = n; i >= 1; i--)
        g << vec[i] << ' ';
}

int main() {
    citire();
    sortare();
    afisare();
    return 0;
}