#include <fstream>
#include <vector>

using namespace std;
const int NMAX = 50002;

ifstream cin("sortaret.in");
ofstream cout("sortaret.out");

vector < vector < int > > v;
vector < int > ans;
int f[NMAX];

void dfs(int start) {
    if(f[start] == 1)
        return;
    f[start] = 1;
    for(auto var : v[start]) {
        if(f[var] == 0)
            dfs(var);
    }
    ans.push_back(start);
}

int main()
{
    int n, m, x ,y;
    cin >> n >> m;
    v.resize(n + 1);
    for(int i = 1; i <= m; i++) {
        cin >> x >> y;
        v[x].push_back(y);
    }
    for(int i = 1; i <= n; i++)
        dfs(i);

    for(int i = ans.size() - 1; i >= 0; i--)
        cout << ans[i] << " ";
    return 0;
}