#include <queue>
#include <fstream>
#include <vector>

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




class Graph{
private:
    int V;
    std::vector<std::vector<int>>adj;
    std::vector<int>in_degree;
public:
    Graph(int v) {
        V = v+1;
        adj.resize(V);
        in_degree.resize(V);
    }

    void addEdge(int x, int y) {
        adj[x].push_back(y);
        in_degree[y]++;
    }

    void kahn() {
        std::priority_queue<int>pq;
        for(int i=1;i<V;++i) {
            if(!in_degree[i]) pq.push(i);
        }

        while(!pq.empty()) {
            int c = pq.top();
            fout << c << " ";
            pq.pop();
            for(int &vecin : adj[c]) {
                in_degree[vecin]--;
                if(!in_degree[vecin]) pq.push(vecin);
            }
        }
    }

};


int main(void) {
    int n, m, x, y;
    fin >> n >> m;
    
    Graph g(n);
    
    for(int i=1;i<=m;++i) {
        fin >> x >> y;
        g.addEdge(x, y);
    }

    g.kahn();
    
    return 0;
}