#include <iostream>
#include <fstream>
#include <vector>
#include <stack>
using namespace std;
ifstream f("sortaret.in");
ofstream g ("sortaret.out");
int n,m;
stack<int>st;
vector<int>adiacenta[50001];
int viz[50001];
void citire()
{
    f >> n >> m;
    for(int i = 1;i<=m;i++)
    {
        int x,y;
        f >> x >> y;
        adiacenta[x].push_back(y);
    }
}
void DFS(int nod)
{
    viz[nod] = 1;
    for(auto x:adiacenta[nod])
    {
        if(!viz[x])
            DFS(x);
    }
    st.push(nod);
}
int main()
{
    citire();
    for(int i = 1;i<=n;i++)
    {
        if(!viz[i])
            DFS(i);
    }
    while(!st.empty())
    {
        g <<st.top()<< " ";
        st.pop();
    }
}