#include <fstream>
#include <vector>
#define nmax 50001
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector <int> v[nmax];
int x,y,i,sol[nmax],viz[nmax],k,n,m;
void df(int i)
{
    int j;
    viz[i]=1;
    for(j=0;j<v[i].size();j++)
        if(!viz[v[i][j]]) df(v[i][j]);
    sol[++k]=i;
}
int main()
{
    f>>n>>m;
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        v[x].push_back(y);
    }
    for(i=1;i<=n;i++)
        if(!viz[i]) df(i);
    for(i=n;i>=1;i--)
        g<<sol[i]<<' ';
    return 0;
}