#include <fstream>
#include <vector>
#define nmax 50001
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int n,m;
int viz[nmax],timp[nmax],k;
vector <int> G[nmax];

void read()
{int i;
 int x,y;
 fin>>n>>m;
 for(i=1;i<=m;i++)
   {fin>>x>>y;
    G[x].push_back(y);
   }
}

void dfs(int x)
{int i;
 viz[x]=1;
 for(i=0;i<G[x].size();i++)
    if(!viz[G[x][i]]) dfs(G[x][i]);
 timp[++k]=x;
}

void write()
{int i;
 for(i=1;i<=n;i++)
    if(!viz[i]) dfs(i);
 for(i=n;i>=1;i--)
    fout<<timp[i]<<" ";
 fout<<"\n";
}
int main()
{
 read();
 write();
 return 0;
}