#include <bits/stdc++.h>
#define cin ci
#define cout co
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
int n, m, x, y;
vector<vector<int>> graf;
vector<int> grad;
queue<int> q;
void sorttop()
{
    for(int i=1; i<=n; i++)
        if(!grad[i])
            q.push(i);
    while(!q.empty())
    {
        int node = q.front();
        q.pop();
        cout << node << " ";
        for(auto next:graf[node])
        {
            grad[next]--;
            if(!grad[next])
                q.push(next);
        }
    }
}
int main()
{
    cin >> n >> m;
    graf.assign(n+1, vector<int>());
    grad.resize(n+1);
    for(int i=1; i<=m; i++)
    {
        cin >> x >> y;
        graf[x].push_back(y);
        grad[y]++;
    }
    sorttop();
    return 0;
}