#include <bits/stdc++.h>

using namespace std;

int n,m;
vector<int>M[100001];
vector<int>ans;
queue<int>q;
int grad[100001];
int main()
{
    cin >> n >> m;
    while(m--)
          {

              int x,y;
              cin >> x >> y;
              M[x].push_back(y);
              grad[y]++;


          }
        for(int i = 1;i<=n;++i)
         {
             if(grad[i] == 0)
             {
                 q.push(i);

             }
         }

      while(!q.empty())
        {
            int x = q.front();
            ans.push_back(x);
            q.pop();

            for(auto i : M[x])
            {
                grad[i]--;
                if(grad[i] == 0)
                      q.push(i);
            }
        }
      for(auto i : ans)
        cout << i << " ";


    return 0;
}