#include <iostream>
#include <fstream>
#include <vector>
#define NMAX 50005
using namespace std;
int n,m,x,y,postodine[NMAX],viz[NMAX],nr;
vector<int> a[NMAX];

void dfs(int nod)
{
    viz[nod]=1;
    for(int i=0;i<a[nod].size();i++)
    {
        if(viz[a[nod][i]]==0)
        dfs(a[nod][i]);
    }
    postodine[nr++]=nod;
}
int main()
{
    ifstream in("sortaret.in");
    ofstream out("sortaret.out");
    in >> n >> m;
    for(int i=0;i<m;i++)
    {
        in >> x >> y;
        a[x].push_back(y);
    }
    for(int i=1;i<=n;i++)
        if(!viz[i])
            dfs(i);
    for(int i=nr-1;i>=0;i--)
        out << postodine[i] << " ";
    return 0;
}