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


vector <vector <int > >la;
list <int> topo;
vector <bool> used;
int n,m;

void citire()
{
    int x,y;
    cin >> n >> m;
    la.resize(n+1);
    used.resize(n+1);
    for(int i=1;i<=m;++i)
    {
        cin >> x >> y;
        la[x].push_back(y);
    }
}

void dfs(int x)
{
    used[x] = 1;
    for(int &i : la[x])
        if(!used[i])dfs(i);

    topo.push_front(x);
}

int main()
{
    freopen("sortaret.in","r",stdin);

    citire();
    dfs(1);

    freopen("sortaret.out","w",stdout);

    for(int &i : topo)cout << i << ' ';

}