#include <bits/stdc++.h>

using namespace std;

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

int n,m,top;
vector<int> L[100005];
bool viz[100005];
int sortat[100005];

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

void DFS(int nod)
{
    viz[nod]=1;
    for(auto it: L[nod])
        if(!viz[it])
            DFS(it);
    sortat[++top]=nod;
}

void Afisare()
{
    for(int i=1; i<=n; i++)
        if(!viz[i])
            DFS(i);
    for(int i=n; i>=1; i--)
        fout<<sortat[i]<<" ";
}


int main()
{
    Citire();
    Afisare();
    return 0;
}