#include <fstream>
#include <vector>
#define pb push_back
#define NMAX 50005

using namespace std;

ifstream cin("sortaret.in");
ofstream cout("sortaret.out");

vector<int> adj[NMAX];
vector<int> lista;
int n,m;
bool vis[NMAX],fr[NMAX];
void dfs(int nod)
{
    for(int k=0; k < adj[nod].size(); k++)
    {
        if(!vis[adj[nod][k]])
        {
            vis[adj[nod][k]] = 1;
            lista.pb(adj[nod][k]);
            dfs(adj[nod][k]);
        }
    }
}
int main()
{
    cin >> n >> m;
    for(int i=1; i <= m; i++)
    {
        int x,y;
        cin >> x >> y;
        adj[x].pb(y);
        fr[y] = 1;
    }
    for(int i=1; i <= n; i++)
    {
        if(!fr[i])
        {
            vis[i] = 1;
            lista.pb(i);
            dfs(i);
            break;
        }
    }
    for(auto it : lista)
    {
        cout << it << ' ';
    }
    return 0;
}