#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
using llx = long long;

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

#define NMAX 50000

vector <int> v[NMAX+1];
int grad[NMAX+1], sortat[NMAX+1];

int main()
{
    int n, m, i, j, x, y;

    fin >> n >> m;
    for (i = 1; i<=m; i++)
    {
        fin >> x >> y;
        v[x].push_back(y);
        grad[y]++;
    }

    for (i = 1; i<=n; i++)
        if (grad[i] == 0)
            sortat[++sortat[0]] = i;

    for (i = 1; i<=n; i++)
    {
        x = sortat[i];
        for (const auto &nv : v[x]) // "Range-based for statement" -> https://learn.microsoft.com/en-us/cpp/cpp/range-based-for-statement-cpp?view=msvc-170
        {
            grad[nv]--;
            if (grad[nv] == 0)
                sortat[++sortat[0]] = nv;
        }
    }

    for (i = 1; i<=n; i++)
        fout << sortat[i] << ' ';
    return 0;
}