#include <iostream>
#include <fstream>
#include <vector>
#define nmax 50005
using namespace std;

ofstream out("sortaret.out");
int N, M;
vector<int> v[nmax];
int viz[nmax];

void df(int nod) {

    viz[nod] = 1;
    out << nod << " ";
    for (int i=0; i<v[nod].size(); ++i)
        if ( !viz[ v[nod][i] ] )
            df(v[nod][i]);
}

int main() {
    ifstream in("sortaret.in");
    in >> N >> M;

    for (int i=1; i<=M; ++i) {
        int x, y;
        in >> x >> y;
        v[x].push_back(y);
    }

    for (int i=1; i<=N; ++i) {
        if (!viz[i]) {
            df(i);
        }
    }
}