#include <cstdio>
#include <algorithm>
#include <vector>
#include <queue>
using namespace std;


const int MX = 100007; // maximum number of nodes in the graph.
int n,m,u,v;
vector<int> G[MX]; // adjacency list.
int in[MX];

vector<int> TS; // the output vector with nodes sorted in topological order.


int main() {
  /* Input format: 
     n - number of nodes
     m - number of edges
     we assume nodes are enumbered 1..n
     next m lines contains edges descriptions
     represented as a pair of integers.
  */
  scanf("%d %d", &n, &m);
  while(m--) {
    scanf("%d %d", &u, &v);
    G[u].push_back(v); // add edge to adjcency list
    in[v]++; // increase input order of v
  }
  // Add all the nodes with zero input order to the awswer.
  for(int i=1; i<=n; ++i) if(in[i]==0) TS.push_back(i);
  // For every noded that we added to the Topological Order so far:
  for(int i=0; i<TS.size(); ++i) {
    int current_node = TS[i];
    // for every edge foing out of current_node (current_node->neighbour).
    for(int j = 0; j<G[current_node].size(); ++j) {
      int neighbour = G[current_node][j];
      // Decrease input order of neighbour ("delete" edge).
      in[neighbour]--;
      // If input order of the neighbour is 0 add it to anwser.
      if(in[neighbour] == 0) TS.push_back(neighbour);
    }
  }
  // Print the anwser out.
  for(int i=0; i<TS.size(); ++i) 
    printf("%d ", TS[i]);
  printf("\n");
}