#include <bits/stdc++.h>
#define nmax 50001
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector<int>h[nmax];
int n,m,sol[nmax],viz[nmax],nsol;
void Citire()
{
    int i,x,y;
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        h[x].push_back(y);
    }
}
void DFS(int varf)
{
    viz[varf]=1;
    for(int i=0;i<h[varf].size();i++)
        if(!viz[h[varf][i]])
            DFS(h[varf][i]);
    sol[++nsol]=varf;
}
void Rezolvare()
{
    int i;
    for(i=1;i<=n;i++)
        if(!viz[i])
            DFS(i);
    for(i=nsol;i>=1;i--)
        fout<<sol[i]<<" ";
}
int main()
{
    Citire();
    Rezolvare();
    fin.close();
    fout.close();
    return 0;
}