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

const int MAXN = 1e5 + 5;

using namespace std;

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

vector<int>graf[MAXN];
queue<int>coada;
bool viz[MAXN];
int n,m,grad[MAXN];

void sortare_topologica(){
    for(int i = 1; i <= n; i++)
        if(grad[i] == 0)
            coada.push(i);
    while(coada.size()){
        int nod = coada.front();
        coada.pop();
        out<<nod<<" ";
        for(int i = 0; i < graf[nod].size(); i++){
            int vecin = graf[nod][i];
            grad[vecin]--;
            if(grad[vecin] == 0)
                coada.push(vecin);
        }
    }
}

int main()
{
    in>>n>>m;
    for(int i = 1; i <= m; i++){
        int x,y;
        in>>x>>y;
        graf[x].push_back(y);
        grad[y]++;
    }
    sortare_topologica();
    return 0;
}