#include <fstream>
#include <vector>
using namespace std;
#define dim 50009

ifstream f("sortaret.in");
ofstream g("sortaret.out");

vector <int> muchii[dim];
vector <int> lista;
int n,m,x,y,viz[dim];

void dfs(int k){
   viz[k]=1;
   for(int i=muchii[k].size()-1;i>=0;i--) if(viz[muchii[k][i]]==0) dfs(muchii[k][i]);
   lista.push_back(k);

}

int main()
{
    f>>n>>m;
    for(int i=1;i<=m;i++){
       f>>x>>y;
       muchii[x].push_back(y);
    }
    for(int i=1;i<=n;i++){ if(viz[i]==0) dfs(i);}

    for(int i=lista.size()-1;i>=0;i--) g<< lista[i]<<" ";

    f.close();g.close();
    return 0;
}