// QQQ
#define _CRT_SECURE_NO_WARNINGS

#include <cstdio>
#include <iostream>
#include <vector>
#include <stack>

using namespace std;

#define MAX_N 50010

#define UNTOUCHED 0
#define VISITED 1
#define DONE 2

typedef struct _node {
    int state;
} node;

vector<int> edges[MAX_N];
int state[MAX_N];
stack<int> result;

void dfs(int node)
{
    state[node] = VISITED;
    for (vector<int>::iterator it = edges[node].begin(); it != edges[node].end(); ++it)
    {
        if (state[*it] == UNTOUCHED)
        {
            dfs(*it);
        }
    }

    state[node] = DONE;
    result.push(node);
}

int main()
{
    int n, m;

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

    cin >> n >> m;
    for (int i = 0; i < m; ++i)
    {
        int from, to;

        cin >> from >> to;

        edges[from].push_back(to);
    }

    // topo
    for (int i = 1; i < n; ++i)
    {
        if (state[i] == UNTOUCHED)
        {
            dfs(i);
        }
    }

    {
        while (!result.empty())
        {
            int node = result.top();

            cout << node << " ";

            result.pop();
        }
    }

    return 0;
}