#include <bits/stdc++.h>
using namespace std;
ifstream in("sortaret.in");
ofstream out("sortaret.out");
vector <int> v[50005];
int c[50005];
int viz[50005];
int cnt;
void f(int x)
{
    viz[x] = 1;
    for(auto it : v[x])
        if(viz[it] == 0)
            f(it);
    c[cnt] = x;
    cnt ++;
}
int main()
{
    int n, m;
    in >> n >> m;
    for(int i = 1; i <= m; i ++)
    {
        int a, b;
        in >> a >> b;
        v[a].push_back(b);
    }
    for(int i = 1; i <= n; i ++)
        if(viz[i] == 0)
            f(i);
    for(int i = 0; i < cnt; i ++)
        out << c[i] << " ";
    return 0;
}