#include <iostream>
#include <fstream>
#include <vector>
#include <stack>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int n, m, s;
vector< vector<int> > graph;
vector<bool> visited;
stack<int> sortat;
void dfs(int vertex);
int main()
{
fin >> n >> m;
if (n < 1 || n > 50000 || m < 1 || m > 100000)
return 1;
graph.resize(n);
visited.resize(n, false);
int x, y;
for (int i = 0; i < m; i++) {
fin >> x >> y;
x--;
y--;
graph[x].push_back(y);
}
fin.close();
for (int i = 0; i < n; i++)
if (!visited[i]) {
dfs(i);
}
while (!sortat.empty()) {
fout << sortat.top() << " ";
sortat.pop();
}
fout.close();
return 0;
}
void dfs(int vertex)
{
if (vertex < 0 || vertex > n - 1)
return;
stack<int> s;
int element, i;
bool found;
s.push(vertex);
visited[vertex] = true;
while (!s.empty()) {
element = s.top();
found = false;
for (i = 0; i < graph[element].size() && !found; i++)
if (!visited[graph[element][i]]) {
found = true;
s.push(graph[element][i]);
visited[graph[element][i]] = true;
}
if (!found) {
sortat.push(s.top() + 1);
s.pop();
}
}
}