#include <fstream>
#include <vector>
#include <bitset>
#define Nmax 50009

using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");

int n,m,x,y,sol[Nmax],nr;

vector <int> G[Nmax];
bitset <Nmax> viz;

void DFS(int node) {

    viz[node]=1;

    for (auto x : G[node])
        if (!viz[x]) DFS(x);

    ++nr;
    sol[nr]=node;
}

int main() {

    f>>n>>m;
    for (int i=1; i<=m; ++i) {
        f>>x>>y;
        G[x].push_back(y);
    }

    for (int i=1; i<=n; ++i)
        if (!viz[i]) {
            DFS(i);
        }
    for (int i=nr; i>=1; --i)
        g<<sol[i]<<' ';
    f.close(); g.close();
    return 0;
}