#include <fstream>
#include <vector>
#define NMAX 50002
using namespace std;
ifstream  fin("sortaret.in");
ofstream fout("sortaret.out");
int N,M,nr,viz[NMAX],sol[NMAX];
vector<int> graph[NMAX];

void citire()
{
    int X,Y;
    fin>>N>>M;

    for(int i=1; i<=M; i++)
    {
        fin>>X>>Y;
        graph[X].push_back(Y);
    }
}

void DFS(int nod)
{
    viz[nod]=1;
    for(int i=0; i<graph[nod].size(); i++)
    {
        if(!viz[graph[nod][i]])
        {
            DFS(graph[nod][i]);
        }
    }

    sol[++nr]=nod;
}

int main()
{
    citire();

    nr=0;
    for(int i=1; i<=N; i++)
    {
        if(!viz[i])
        {
            DFS(i);
        }
    }

    for(int i=1; i<=N; i++)
    {
        fout<< sol[i] << " ";
    }
    fout<< "\n";

    return 0;
}