#include <bits/stdc++.h>
#define NMAX 50005
using namespace std;
typedef long long ll;

int dx[] = {-1, 0, 1, 0, -1, -1, 1, 1};
int dy[] = {0, 1, 0, -1, -1, 1, 1, -1};

const string file = "sortaret";

ifstream fin(file + ".in");
ofstream fout(file + ".out");

int n, m;
int vf, x, y;
int viz[NMAX];
int st[NMAX];

vector<int>a[NMAX];

void dfs(int x) {
    viz[x] = 1;
    for (auto i : a[x]) {
        if (!viz[i]) {
            dfs(i);
        }
    }
    st[++vf] = x;
}

int main() {
    fin >> n >> m;
    for (int i = 1; i <= m; i++) {
        fin >> x >> y;
        a[x].push_back(y);
    }
    for (int i = 1; i <= n; i++) {
        if (!viz[i])
            dfs(i);
    }
    while (vf)
        fout << st[vf--] << " ";
    return 0;
}