#include <bits/stdc++.h>

using namespace std;

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

int n,m,seen[50005];

vector <int> V[50005];

vector <int> sol;

void dfs(int nod)
{
    seen[nod] = 1;
    for(auto it:V[nod])
    {
        if(seen[it] == 0)
        {
            dfs(it);
        }
    }
    sol.push_back(nod);
}

int main()
{
    fin>>n>>m;
    for(int i = 1;i<=m;i++)
    {
        int a,b;
        fin>>a>>b;
        V[a].push_back(b);
    }
    for(int i = 1;i<=n;i++)
    {
        if(seen[i]==0)
        {
            dfs(i);
        }
    }
    reverse(sol.begin(),sol.end());
    for(auto it:sol)
    {
        fout<<it<<' ';
    }
}