#include <bits/stdc++.h>

using namespace std;

long long n, m, viz[100001];
vector<int> v;
vector<int> a[50001];

void dfs(int gogu) {
    viz[gogu] = 1;
    for(auto i : a[gogu])
        if(!viz[i])
            dfs(i);
    v.push_back(gogu);
}

void solutie() {
    for(int i = 1; i <= n; i++)
        if(!viz[i])
            dfs(i);
}

int main() {
    ifstream cin("sortaret.in");
    ofstream cout("sortaret.out");
    cin >> n >> m;
    for(int i = 1; i <= m; i++) {
        int x, y;
        cin >> x >> y;
        a[x].push_back(y);
    }
    solutie();
    for(int i = v.size() - 1; i >= 0; i--)
        cout << v[i] << ' ';
    return 0;
}