#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

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

#define lim 50010
int n,m,x,y,viz[lim],lev[lim],rez[lim],dr;
vector <int> G[lim];


void dfs(int nod)
{
    viz[nod]=1;
    for(auto it:G[nod])
        if(!viz[it])
            dfs(it);
    rez[++dr]=nod;
}


int main()
{
    fin>>n>>m;
    for(int i=1; i<=m; i++)
    {
        fin>>x>>y;
        G[x].push_back(y);
    }

    for(int i=1; i<=n; i++)
        if(!viz[i])
            dfs(i);

    for(int i=dr; i>=1; i--)
        fout<<rez[i]<<' ';

    fin.close();
    fout.close();
    return 0;
}