#include <iostream>
#include <fstream>
#include <vector>
#define zero 0
#define unu 1
#define doi 2
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int n, m;
vector<int> gr[50005], v;
bool viz[50005];

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

void DFS(int nod) {
  viz[nod] = unu;
  for (int i = 0; i < gr[nod].size(); i++) {
    if (viz[gr[nod][i]] == zero) {
      DFS(gr[nod][i]);
    }
  }
  viz[nod] = doi;
  v.push_back(nod);
}

void parcComp() {
  for (int i = 1; i <= n; i++)
    if (viz[i] == zero) {
      DFS(i);
    }
}

int main(int argc, const char * argv[]) {
  citire();
  parcComp();
  for (int i = 0; i < v.size(); i++)
    fout << v[i] << " ";
}