#include <fstream>
#include <vector>
#include <bitset>
using namespace std;
string file = "sortaret";
ifstream cin (file + ".in");
ofstream cout (file + ".out");
vector <int> L[50001],v;
bitset <50001> viz;

void dfs(int x)
{
    viz[x] = 1;
    for (int y : L[x])
    {
        if (!viz[y])
            dfs(y);
    }
    v.push_back(x);
}
int main()
{
    int n,m,x,y;
    cin >> n >> m;
    for (int i=1; i<=m; i++)
    {
        cin >> x >> y;
        L[x].push_back(y);
    }
    for (int i=1; i<=n; i++)
    {
        if (!viz[i])
            dfs(i);
    }
    for (int i = v.size()-1; i>=0; i--)
        cout << v[i] << ' ';
}