#include <bits/stdc++.h>
using namespace std;
#define NMAX 50050
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
vector <int> G[NMAX];
int n,m;
void citire(){
    fin>>n>>m;
    for(int i=1,x,y;i<=m;i++){
        fin>>x>>y;
        G[x].push_back(y);
    }
}
bitset <NMAX> viz;
deque <int> d;
void DFS(int x){
    viz[x]=1;
    for(int it=0;it<G[x].size();it++)
        if(!viz[it])
            DFS(it);
    d.push_front(x);
}
void afisare(){
    for(int i=0;i<n;i++)
        fout<<d[i]<<" ";
}
int main()
{
    citire();
    for(int i=1;i<=n;i++)
        if(!viz[i])
            DFS(i);
            afisare();
    return 0;
}