#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
const int N =50004;
queue<int> q;
vector <int> L[N];
int grdInt[N];
int n ,m;
int main() {
    int x,y;
    cin >> n >> m;
    for(int i = 1; i <=m; i ++) {
        cin >> x >> y;
        L[x].push_back(y);
        grdInt[y]++;
    }
    for(int i = 1 ;i <=n; i ++)
    {
        if(grdInt[i] == 0)
            q.push(i);
    }
    while(!q.empty())
    {
        int aux = q.front();
        cout << aux<<" ";
        q.pop();
        for(int i :L[aux])
        {
            grdInt[i]--;
            if(!grdInt[i])
                q.push(i);
        }
    }
    return 0;
}