#include <iostream>
#include <fstream>
#include <vector>

using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int n, m, x, y, cnt, s[50005], viz[50005];
vector<int> v[50005];
void dfs(int a)
{
    viz[a] = 1;
    for(int it=0;it<v[a].size();it++)
        if(!viz[it])
            dfs(it);
    s[cnt++] = a;
}
int main()
{
    f>>n>>m;
    for(;m;m--)
    {
        f>>x>>y;
        v[x].push_back(y);
    }
    for(int i = 1; i <= n; i++)
        if(!viz[i])
            dfs(i);
    for(int i = n - 1; i >= 0; i--)
        g << s[i] << " ";
    return 0;
}