#include <fstream>
#include <vector>
#include <stack>

using namespace std;

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

vector<int> A[50005];
int in_degree[50005];
vector<int> result;
stack<int> grad_intern_zero;

int main() {
    int N, M;
    fin >> N >> M;
    int x, y;

    for (int i = 0; i < M; i++) {
        fin >> x >> y;
        A[x].push_back(y);
        in_degree[y]++;
    }

    for(int i = 1; i <= N; i++) {
        if (in_degree[i] == 0) {
            grad_intern_zero.push(i);
        }
    }
    
    while (!grad_intern_zero.empty()) {
        int n = grad_intern_zero.top();
        grad_intern_zero.pop();
        result.push_back(n);

        for (auto m : A[n]) {
            in_degree[m]--;
            if (in_degree[m] == 0) {
                grad_intern_zero.push(m);
            }
        }
    }

    for (auto x : result) {
        fout << x << " ";
    }

    return 0;
}