#include<fstream>
#include<vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n,m,x,y,i,j;
bool viz[50005];
vector<int>a[50005];
void dfs(int nod)
{
    //viz[nod]=1;
    g<<nod<<" ";
    for(j=0;j<a[nod].size();j++)
      if(viz[a[nod][j]]==0)
        dfs(a[nod][j]);
    viz[nod]=1;
}
int main()
{
    f>>n>>m;
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        a[x].push_back(y);
    }
    for(i=1;i<=n;i++)
      if(viz[i]==0)
      {
          //viz[i]=1;
          dfs(i);
      }
    return 0;
}