#include <cstdio>
#include <vector>
#include <stack>
 
#define NMAX 50005
 
using namespace std;
 
int N, M;
bool viz[NMAX];
vector <int> G[NMAX];
stack <int> sol;
 
void citire()
{
    int a, b;
 
    scanf("%d %d", &N, &M);
 
    for (int i = 1; i <= M; ++i)
    {
        scanf("%d %d", &a, &b);
        G[a].push_back(b);
    }
}
 
void DFS(int nod)
{
    vector <int> :: iterator it;
 
    viz[nod] = true;
 
    for (it = G[nod].begin(); it != G[nod].end(); ++it)
        if (viz[*it] == false)
            DFS(*it);
 
    sol.push(nod);
}
 
void afisare()
{
    while (sol.empty() == false)
    {
        printf("%d ", sol.top());
        sol.pop();
    }
}
 
int main()
{
    freopen("sortaret.in", "r", stdin);
    freopen("sortaret.out", "w", stdout);
 
    citire();
    for (int i = 1; i <= N; ++i)
    {
        if (viz[i] == false)
            DFS(i);
    }
    afisare();
 
    return 0;
}