#include <vector>
#include <fstream>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n, m;

vector <int> graph [50005];
int viz[50005];

void dfs (int node)
{
    viz[node] = 1;
    int dim = graph[node].size(); //nr vecini nod
    for(int i=0; i<dim; i++)
    {
        int vecin = graph[node][i];
        if(!viz[vecin])
            dfs(vecin);
    }
    g<<node<<" ";
}

int main ()
{
    f>>n>>m;

    for(int i=1; i<=m; i++)
    {
        int x, y; //arc (x,y)
        f>>x>>y;
        graph[y].push_back(x);
    }

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