#include <bits/stdc++.h>

using namespace std;

int N,M,indt;
int t[50003];
bitset<50003>viz;
vector<int>L[50003];

void Citire()
{
    int i,x,y;
    ifstream fin("sortaret.in");
    fin>>N>>M;
    for(i=1;i<=M;++i)
    {
        fin>>x>>y;
        L[x].push_back(y);
    }
    fin.close();
}

void DFS(int x)
{
    int y;
    unsigned int i;
    viz[x]=1;
    for(i=0;i<L[x].size();++i)
    {
        y=L[x][i];
        if(viz[y]==0)
            DFS(y);
    }
    t[++indt]=x;
}

void Sortaret()
{
    int i;
    for(i=1;i<=N;++i)
        if(viz[i]==0)
            DFS(i);
}

void Afisare()
{
    int i;
    ofstream fout("sortaret.out");
    for(i=N;i>=1;--i)
        fout<<t[i]<<" ";
    fout<<"\n";
    fout.close();
}

int main()
{
    Citire();
    Sortaret();
    Afisare();
    return 0;
}