#include <fstream>
#include <vector>
#include <set>

using namespace std;
ifstream cin ("sortaret.in");
ofstream cout ("sortaret.out");

const int dim = 5e4 + 5;

vector<int> v[dim];
set<int> s;
int grad[dim];

int main()
{
    int n , m;
    cin >> n >> m;
    while(m--)
        {
            int x , y;
            cin >> x >> y;
            v[x].push_back(y);
            grad[y]++;
        }
    for(int i = 1 ; i <= n ; ++i)
        if(grad[i] == 0)
            s.insert(i);
    while(!s.empty())
        {
            int a = *s.begin();
            s.erase(s.begin());
            cout << a <<' ';
            for(int i = 0 ; i < v[a].size() ; ++i)
            {
                grad[v[a][i]]--;
                if(grad[v[a][i]] == 0)
                    s.insert(v[a][i]);
            }
        }
}