#include <bits/stdc++.h>
#define NMAX 50000

using namespace std;

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

int n, m, x, y;
vector<int> graf[NMAX + 2];
int gr[NMAX + 2];
queue<int> q;

int main() {
    ios_base::sync_with_stdio(false);
    fin.tie(NULL);
    fout.tie(NULL);

    fin >> n >> m;
    for (int i = 1; i <= m; i++) {
        fin >> x >> y;
        graf[x].emplace_back(y);
        gr[y]++;
    }

    for (int i = 1; i <= n; i++) {
        if (!gr[i]) {
            q.push(i);
        }
    }
    while (!q.empty()) {
        int nod = q.front();
        fout << nod << ' ';
        q.pop();
        for (int vec : graf[nod]) {
            gr[vec]--;
            if (!gr[vec]) {
                q.push(vec);
            }
        }
    }
    return 0;
}