#include <bits/stdc++.h>

using namespace std;

int n, m, post[50005], p;
vector<int> v[50005];
bool ok[50005];

void df(int x)
{
    ok[x] = 1;
    for (vector<int>::iterator it = v[x].begin(); it != v[x].end(); ++it)
        if(!ok[*it])
            df(*it);
    post[++p] = x;
}

int main()
{
    ifstream fin ("sortaret.in");
    ofstream fout ("sortaret.out");
    fin >> n >> m;
    for (int i = 1; i <= m; ++i){
        int x, y;
        fin >> x >> y;
        v[x].push_back(y);
    }
    for (int i = 1; i <= n; ++i)
        if(!ok[i])
            df(i);
    for (int i = p; i; --i)
        fout << post[i] << " ";
    fin.close();
    fout.close();
    return 0;
}