#include <fstream>
#include <vector>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
int n,i,j,m,nod,x,y;
bool viz[50005];
vector<int> v[50005];


void dfs(int nod)
{
    viz[nod]=1;

    for(int i=0; i<v[nod].size(); ++i)
    {
        if(viz[v[nod][i]]==0)
            dfs(v[nod][i]);
    }

    v[n+1].push_back(nod);


}
int main()
{

    cin>>n>>m;
    for(i=1; i<=m; ++i)
    {

        cin>>x>>y;
        v[y].push_back(x);
    }

    for(i=1; i<=n; ++i)
    {
        if(viz[i]==0)
        {
            dfs(i);
        }
    }

    for(i=0;i<v[n+1].size();++i)
    {
        cout<<v[n+1][i]<<" ";
    }

    return 0;
}