#include <bits/stdc++.h>

#define NMAX 50002

using namespace std;

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

int n, m;
vector<int> G[NMAX];
bitset<NMAX> viz;
stack<int> s;

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

void dfs(int nod)
{
    if (viz[nod]) return;
    viz[nod] = true;

    for (auto vec : G[nod])
        if (!viz[vec]) dfs(vec);

    s.push(nod);
}

int main()
{
    read_data();

    for (int i = 1; i <= n; i++)
        if (!viz[i]) dfs(i);

    while (!s.empty())
    {
        fout << s.top() << " ";
        s.pop();
    }
    return 0;
}