#include <algorithm>
#include <vector>
#include <iostream>
#include <fstream>
#include <stdio.h>

#define MAX_N 50100
#define pb push_back

using namespace std;

vector <int> neighbours[MAX_N];
vector <int> sortedGraph;
bool visited[MAX_N];

void SortTop(int node) {
    if (visited[node])
        return;
    visited[node] = true;
    for (auto neighbour: neighbours[node])
        SortTop(neighbour);
    sortedGraph.pb(node);
}       

int main() {
    ifstream cin("sortaret.in");
    freopen("sortaret.out", "w", stdout);

    int n, m;
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int x, y;
        cin >> x >> y;
        neighbours[x].pb(y);
    }

    for (int i = 1; i <= n; i++)
        SortTop(i);

    for (int i = 0; i < sortedGraph.size(); i++)
        printf("%d ", sortedGraph[i]);

    return 0;
}