#include <bits/stdc++.h>
using namespace std;
#define STOP fout.close(); exit(EXIT_SUCCESS);
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
///***********************
const int NMAX = 5e4 + 3;
int n, m;
vector<int> revEdges[NMAX];
bitset<NMAX> vis;

void read() {
    fin >> n >> m;
    for (int a, b, i = 1; i <= m; i++) {
        fin >> a >> b;
        revEdges[b].push_back(a);
    }
}

void dfs(int node) {
    vis[node] = true;
    for (int it : revEdges[node])
        if (!vis[it])
            dfs(it);
    fout << node << ' ';
}

void solve() {
    for (int i = 1; i <= n; i++)
        if (!vis[i])
            dfs(i);
}

int main() {
    //freopen("text.txt", "r", stdin);
    read();
    solve();
    return 0;
}