// Sortare Topologica - O(N+M)
#include <fstream>
#include <vector>
#include <bitset>
#define Nmax 50099
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int N,M,Tsort[Nmax],x,y;

vector < int > G[Nmax];
bitset < Nmax > viz;


void DFS(int node)
{
    viz[node]=1;
    for(vector <int>::iterator it=G[node].begin(); it!=G[node].end(); ++it)
        if(!viz[*it])DFS(*it);
    Tsort[++Tsort[0]]=node;
}

void SorteazaTopologic()
{
    for(int i=1; i<=N; ++i)
        if(!viz[i])DFS(i);
    //Solutia a fost generata invers
    for(int i=N; i>0; --i)g<<Tsort[i]<<' ';
    g<<'\n';
}


int main()
{
    f>>N>>M;
    for(int i=1;i<=M;++i)
        f>>x>>y , G[x].push_back(y);
    SorteazaTopologic();
    f.close();g.close();
    return 0;
}