#include <bits/stdc++.h>
#define N 50005
using namespace std;

ifstream fin ("sortaret.in");
ofstream fout ("sortaret.out");


vector <int> ListaMuchii[N];
int viz[N], sol[N];
int n, ln;


void Citeste()
{
    int x, y, m;
    fin >> n >> m;
    for(int i=1;i<=m;i++)
    {
        fin>>x>>y;
        ListaMuchii[x].push_back(y);
    }
}

void DFS(int k)
{
    viz[k] = 1;
    for(auto i : ListaMuchii[k])
        if(!viz[i]) DFS(i);
    sol[++ln] = k;
}

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

void Afisare()
{
    for(int i = ln; i >= 1; i--)
        fout << sol[i] << " ";
}

int main()
{
    Citeste();
    Rezolva();
    Afisare();
    return 0;
}