#include <bits/stdc++.h>

using namespace std;

ifstream fin ("sortaret.in");
ofstream fout ("sortaret.out");

const int NMAX = 5e4+5;

vector<int> v[NMAX];
queue <int> q;
vector<int> sol;

int grad[NMAX];

int main() {

    int n, m;
    fin >> n >> m;
    for (int i = 1; i <= m; i++) {
        int x, y;
        fin >> x >> y;
        grad[y]++;
        v[x].push_back(y);
    }

    int nod = 1;
    while (grad[nod]) ///gasim nodul cu grad 0
        nod++;

    q.push(nod);
    while (!q.empty()) {
        nod = q.front();
        q.pop();
        sol.push_back(nod);
        for (int fiu : v[nod]) {
            grad[fiu]--;
            if (grad[fiu] == 0)
                q.push(fiu);
        }
    }
    for (int x : sol)
        fout << x << " ";
    return 0;
}