#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

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

const int N=50001;
vector<int> a[N];
int n,m,nrp[N],u=-1,p=0,q[N];
bool viz[N];

void citire()
{
    int x,y,i;
    in>>n>>m;
    for(i=1; i<=m; i++)
    {
        in>>x>>y;
        a[x].push_back(y);
        nrp[y]++;
    }
    in.close();
}

void bfs()
{
    int x,y;
    while(p<=u)
    {
        x=q[p++];
        out<<x<<" ";
        for(size_t i=0; i<a[x].size(); i++)
        {
            y=a[x][i];
            nrp[y]--;
            if(nrp[y]==0)
            {
                q[++u]=y;
            }
        }
    }
}
int main()
{
    int i;
    citire();
    for(i=1; i<=n; i++)
        if(nrp[i]==0)
            q[++u]=i;
    bfs();
    return 0;
}