#include <iostream>
#include <fstream>
#include <cstring>
#include <vector>
#define inFile "sortaret.in"
#define outFile "sortaret.out"
#define nMax 50003

using namespace std;

int n,m,dreapta[nMax],deq[nMax],ct;
vector<int> w[nMax];

void sortareTopologica()
{
    vector<int>::iterator j;
    int i,aux;
    for(i=1;i<=n;i++)
        if(dreapta[i]==0) deq[++ct]=i;

    for(i=1;i<=n;i++)
    {
        aux=deq[i];
        for(j=w[aux].begin();j!=w[aux].end();j++)
        {
            dreapta[*j]--;
            if(dreapta[*j]==0) deq[++ct]=*j;
        }
    }
}

int main()
{
    int a,b,i;

    ifstream fin(inFile);
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>a>>b;
        w[a].push_back(b);
        dreapta[b]++;
    }
    fin.close();

    sortareTopologica();

    ofstream fout(outFile);
    for(i=1;i<=n;i++)
        fout<<deq[i]<<" ";
    fout.close();
}