#include <fstream>
#include<vector>
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int>a[50001];
int i,m,n,x,y,nr[50001],viz[50001],q[50001],u,p;
int main(){
    f>>n>>m;
    for (i=1;i<=m;i++){
        f>>x>>y;
        a[x].push_back(y);
        if (x!=y)
            viz[y]++;
    }
    for (i=1;i<=n;i++)
        nr[i]=a[i].size();
    p=1;
    for (i=1;i<=n;i++)
        if (viz[i]==0){
            u++;
            q[u]=i;
        }
    while (p<=u){
        for (i=0;i<nr[q[p]];i++){
            viz[a[q[p]][i]]--;
        if (viz[a[q[p]][i]]==0){
            u++;
            q[u]=a[q[p]][i];
        }
        }
    g<<q[p]<<" ";
    p++;
    }
    return 0;
}