#include <fstream>

using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
int vf[100005], urm[100005], lst[50005], q[50005], nrp[50005],nr;

void adauga(int x, int y){
    vf[++nr]=y;
    urm[nr]=lst[x];
    lst[x]=nr;
    nrp[y]++;
}
int main()
{
    int n,m,x,y;
    cin>>n>>m;
    for(int i=1;i<=m;i++){
        cin>>x>>y;
        adauga(x,y);
    }
    int st=0, dr=-1;
    for(int i=1;i<=n;i++){
        if(nrp[i]==0){
        q[++dr]=i;
        }
    }
    while(st<=dr){
        x=q[st++];
        cout<<x<<" ";
        for(int p=lst[x];p!=0;p=urm[p]){
            y=vf[p];
            if(--nrp[y]==0){
                q[++dr]=y;
            }
        }
    }
    return 0;
}