#include <bits/stdc++.h>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
const int N=5e4+5;
int n,m,i,j,x,y,deg[N],q[N];
vector<int> e[N];
int main()
{
  fin>>n>>m;
  while(m--)
  {
    fin>>x>>y;
    e[x].push_back(y);
    deg[y]++;
  }
  for(i=1;i<=n;++i)
  {
    if(!deg[i]) q[++q[0]]=i;
  }
  for(i=1;i<=n;++i)
  {
    int x=q[i];
    for(auto y:e[x])
    {
      --deg[y];
      if(!deg[y]) q[++q[0]]=y;
    }
  }
  for(i=1;i<=n;++i)
  {
    fout<<q[i]<<'\n';
  }
  return 0;
}