#include <fstream>
#include <vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,i,x,y;
bool v[100001];
vector<int> a[50001];
vector<int> sol;
vector<int>::reverse_iterator rit;
void dfs(int x)
{
    int i;
    v[x]=1;
    for(i=0 ; i<a[x].size() ; ++i)
        if(v[ a[x][i] ]==0)
            dfs(a[x][i]);
    sol.push_back(x);
}
int main()
{
    f>>n>>m;
    for(i=1 ; i<=m ; ++i)
    {
        f>>x>>y;
        a[x].push_back(y);
    }
    for(i=1 ; i<=n ; ++i)
        if(v[i]==0)
          dfs(i);
    for(rit=sol.rbegin() ; rit!=sol.rend() ; ++rit)
        g<<*rit<<" ";
    g<<'\n';
    return 0;
}