#include <bits/stdc++.h>
using namespace std;
ifstream in("sortaret.in");
ofstream out("sortaret.out");
vector < int > v[50005];
vector < int > s;
int n,m;
bool viz[50005];
void read()
{
     in >> n >> m;
     int x,y;
     while( m-- )
     {
          in >> x >> y;
          v[x].push_back(y);
     }
}
void dfs( int nod)
{
     viz[nod] = 1;
     for(int i=0; i<v[nod].size(); i++ )
         if( !viz[ v[nod][i] ] ) dfs( v[nod][i] );
     s.push_back( nod );

}
int main()
{
     read();
     for(int i=1; i<=n; i++)
          dfs(i);
     for(int i=n-1; i>=0; i-- )
          out << s[i] <<' ';

    return 0;
}