#include<iostream>
#include<fstream>
#include<vector>
using namespace std;
int n,m,x,y;
ifstream in("sortaret.in");
ofstream out("sortaret.out");
bool sol[50001];
int c[50001],nr=0;
vector <vector <int> >v(50001);
void dfs(int k)
{
    int f=v[k].size();
    sol[k]=1;
    for(int i=0;i<f;i++)
        if(sol[v[k][i]]==0)
            dfs(v[k][i]);
    c[++nr]=k;
}
int main()
{
    in>>n;
    in>>m;
    for(int i=1;i<=m;i++)
    {
        in>>x>>y;
        v[x].push_back(y);
    }
    for(int i=1;i<=n;i++)
        if(sol[i]==0)
          dfs(i);
    for(int i=nr;i>=1;i--)
        out<<c[i]<<" ";
}