#include <iostream>
#include <fstream>
#include <vector>
#define NMAX 50005
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int n, m, nex[NMAX], q[NMAX], k;
vector<int> gr[NMAX];
vector<int> :: iterator it;

void citire() {
  fin >> n >> m;
  for (int i = 1; i <= m; ++i) {
    int x, y;
    fin >> x >> y;
    gr[x].push_back(y);
    nex[y]++;
  }
}

void rezolvare() {
  for (int i = 1; i <= n; ++i)
    if (nex[i] == 0)
      q[++k] = i;
  
  for (int i = 1; i <= n; ++i) {
    int x = q[i];
    for (it = gr[x].begin(); it != gr[x].end(); ++it) {
      nex[*it]--;
      if (nex[*it] == 0)
        q[++k] = *it;
    }
  }
}

int main(int argc, const char * argv[]) {
  citire();
  rezolvare();
  for (int i = 1; i <= n; ++i)
    fout << q[i] << " ";
}