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#include <bits/stdc++.h>
using namespace std;

const int NMAX = 1000000;
vector<int> L[NMAX + 1];
int grad[NMAX + 1];

int main(){
    ifstream cin("sortaret.in");
    ofstream cout("sortaret.out");
    int n, m, x, y;
    cin >> n >> m;
    for(int i=1; i<=m; i++){
        cin >> x >> y;
        L[x].push_back(y);
        grad[y]++;
    }
    queue<int>q;
    for(int i=1; i<=n; i++){
        if(grad[i]==0){
            q.push(i);
        }
    }
    while (q.empty()==false){
        int nod = q.front();
        q.pop();
        cout << nod <<" ";
        for(int i=0;i<L[nod].size(); i++){
            int vec=L[nod][i];
            grad[vec]--;
            if(grad[vec]==0){
                q.push(vec);
            }
        }
    }
    return 0;
}