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#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int a,b,ext[50005],x,n,m;
queue <int>q;
vector<int> v[50005];
int main()
{
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        fin>>a>>b;
        v[a].push_back(b);
        ext[b]++;
    }
    for(int i=1;i<=n;i++)
    {
        if(ext[i]==0)
        {
            q.push(i);
        }
    }
    while(!q.empty())
    {
        x=q.front();
        fout<<x<<" ";
        for(int i=0;i<v[x].size();i++)
        {
            ext[v[x][i]]--;
            if(ext[v[x][i]]==0)
            {
                q.push(v[x][i]);
            }
        }
        q.pop();
    }
    return 0;
}