#include <iostream>
#include <cstdio>
#include <vector>
#define MAXN 50000

using namespace std;

vector<int> graf[MAXN];
vector<int> sol;
int viz[MAXN], n, m;

void citire()
{
    scanf("%d %d", &n, &m);
    for (int i = 1; i <= m; i++) {
        int x, y;
        scanf("%d %d", &x, &y);
        graf[x].push_back(y);
    }
}

void solve(int ind)
{
    viz[ind] = 1;
    for (int i = 0; i < graf[ind].size(); i++)
        if (!viz[graf[ind][i]])
            solve(graf[ind][i]);
    sol.push_back(ind);
}

int main()
{
    freopen("sortaret.in", "r", stdin);
    freopen("sortaret.out", "w", stdout);

    citire();
    for (int i = 1; i <= n; i++)
        if (!viz[i])
            solve(i);
    for (int i = sol.size()-1; i >= 0; i--)
        printf("%d ", sol[i]);
    return 0;
}