#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define MOD 1000000007

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef long long ll;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef double ld;

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

int n, m;
vector<int> G[50010];
int deg[50010];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    fin >> n >> m;
    for (int i = 1; i <= m; i++) {
        int x, y;
        fin >> x >> y;
        G[x].pb(y);
        deg[y]++;
    }
    
    vector<int> solution;
    queue<int> q;
    for (int i = 1; i <= n; i++) {
        if (deg[i] == 0) {
            q.push(i);
            solution.pb(i);
        }
    }

    while (!q.empty()) {
        int nod = q.front();
        q.pop();
        for (auto &vecin : G[nod]) {
            deg[vecin]--;
            if (deg[vecin] == 0) {
                q.push(vecin);
                solution.pb(vecin);
            }
        }
    }

    for (auto sol : solution) {
        fout << sol << " ";
    }
    
    return 0;
}