# include <fstream>
# include <vector>
# define DIM 50010
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector <int> Lista[DIM];
int Marcat[DIM],st[DIM],sol[DIM],n,m,i,x,y,k;
void dfs (int nc){
    Marcat[nc]=1;
    int nv;
    for(int i=0;i<Lista[nc].size();i++){
        nv=Lista[nc][i];
        if(Marcat[nv]==0){
            dfs(nv);
        }
    }
    sol[++k]=nc;
}
int main () {
    fin>>n>>m;
    for(i=1;i<=m;i++){
        fin>>x>>y;
        Lista[x].push_back(y);
        st[y]=1;
    }
    for(i=1;i<=n;i++){
        if(st[i]==0)
            dfs(i);
    }
    for(i=n;i>=1;i--)
        fout<<sol[i]<<" ";
    fout<<"\n";
    return 0;
}