#include <iostream>
#include <fstream>
#include <vector>
#include <stack>
#define NMAX 50005

using namespace std;

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

vector<int> v[NMAX];
stack <int> s;
int viz[NMAX];

void DFS(int i)
{
    viz[i]=1;
    for(vector<int> :: iterator it = v[i].begin(); it != v[i].end(); it++)
        if(!viz[*it]) DFS(*it);
    s.push(i);
}

int main()
{
    int n,m, i;
    f>>n>>m;
    for(i = 1; i <= m; i++)
    {
        int x,y;
        f>>x>>y;
        v[x].push_back(y);
    }
    for(int i = 1;i <= n;i++)
        if(!viz[i])
            DFS(i);
    while(!s.empty())
    {
        g << s.top() << ' ';
        s.pop();
    }
}