#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
ifstream fin("input.txt");
#define fout cout
#else
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
#endif

const int NMAX = 5e4;

int n, m;
vector<int> e[NMAX];
vector<int> ans;
deque<int> dq;
int ic[NMAX];
int x, y;

void solve() {

}

int main() {
    fin >> n >> m;
    while (m--) {
        fin >> x >> y;
        e[x].push_back(y);
        ic[y]++;
    }
    for (int i = 1; i <= n; i++)
        if (ic[i] == 0)
            dq.push_back(i);
    while (!dq.empty()) {
        int u = dq.front();
        dq.pop_front();
        ans.push_back(u);
        for (auto v : e[u]) {
            ic[v]--;
            if (ic[v] == 0)
                dq.push_back(ic[v]);
        }
    }
    for (auto a : ans) {
        fout << a << ' ';
    }
    return 0;
}