# include <cstdio>
# include <vector>
using namespace std;

const char *FIN = "sortaret.in", *FOU = "sortaret.out";
const int MAX = 50005;

int N, M;
vector <int> G[MAX], sol;
bool viz[MAX];

void dfs (int S) {
    viz[S] = 1;
    for (vector <int> :: iterator it = G[S].begin (); it != G[S].end (); ++it)
        if (viz[*it] == 0)
            dfs (*it);
    sol.push_back (S);
}

int main (void) {
    freopen (FIN, "r", stdin);
    freopen (FOU, "w", stdout);

    scanf ("%d %d", &N, &M);
    for (int i = 1, x, y; i <= M; ++i) {
        scanf ("%d %d", &x, &y);
        G[x].push_back (y);
    }
    for (int i = 1; i <= N; ++i)
        if (viz[i] == 0)
            dfs (i);
    for (vector <int> :: iterator it = sol.end () - 1; it >= sol.begin (); --it)
        printf ("%d ", *it);
}