#include <iostream.h>
#include <fstream.h>
#include <stdio.h>
#include <vector.h>

#define MAXN 50000

int n, in[MAXN];
vector<int> mat[MAXN];
ofstream fout("sortaret.out");

void go(int i){
  in[i] = -1;
  fout << i << " ";
  for (vector<int>::iterator it = mat[i].begin();
     it != mat[i].end(); ++it) {
  int k  = *it;
  in[k]--;
  if (!in[k])
    go(k);
  }
}

int main(void){
    
ifstream fin("sortaret.in");

int m,x,y;

fin >> n;

for (fin >> m;m;m--){
    fin >> x >> y;
    mat[x].push_back(y);
    in[y]++;
    }

for (int i=1;i<=n;i++)
  if (!in[i]) go(i);

fin.close();
fout.close();
    
return 0;
}