#include <fstream>
#include <vector>
using namespace std;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

vector<int> g[50005], sorted;
int n, m, v[50005];

void citire() {
    fin >> n >> m;
    while(m--) {
        int x, y;
        fin >> x >> y;
        g[x].push_back(y);
    }
}

void dfs(int x) {
    v[x] = 1;
    for(auto next: g[x])
        if(!v[next])
            dfs(next);
    sorted.push_back(x);
}

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

void afis() {
    for(int i = sorted.size()-1; i >= 0; i--)
        fout << sorted[i] << ' ';
}

int main() {
    citire();
    solve();
    afis();
}