#include<iostream>
#include<algorithm>
#include<fstream>
#include<bitset>
#include<vector>
#define Nmax 50001
using namespace std;

vector<int> G[Nmax];
int N, M;
bitset<Nmax> viz;

vector<int> sol;
vector<int> part_sol;

void read_data()
{
    ifstream f("sortaret.in");
    f>>N>>M;

    for(int i = 0; i < M; ++i)
    {
        int x, y;
        f>>x>>y;
        G[x].push_back(y);
    }

    f.close();
}

void dfs(int node)
{
    viz[node] = 1;
    for(auto it = G[node].begin(); it != G[node].end(); ++it)
        if(viz[*it] == false)
            dfs(*it);
    sol.push_back(node);
}
void write_data()
{
    ofstream g("sortaret.out");
    for(auto it = sol.begin(); it != sol.end(); ++it)
        g<<*it<<" ";

    g.close();
}
int main()
{
    viz.reset();
    read_data();

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

    reverse(sol.begin(), sol.end());
    write_data();

    return 0;
}