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

using namespace std;

#define MAX 50002

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

vector < int > G[MAX];
int a[MAX],h;
bool viz[MAX];

void df(int nod)
{
    if(!viz[nod])
    {
        viz[nod]=1;
        for(int i=0;i<G[nod].size();i++)
            df(G[nod][i]);
        a[++h]=nod;
    }
}

int main()
{
    int n,m,x,y;
    fin>>n>>m;
    while(m--){
        fin>>x>>y;
        G[x].push_back(y);
    }
    for(int i=1;i<=n;i++)
        df(i);
    for(int i=n;i>0;i--)
        fout<<a[i]<<" ";
    fin.close();
    fout.close();
    return 0;
}