#include <fstream>
#include <vector>
std::ifstream fin("sortaret.in");
std::ofstream fout("sortaret.out");
int n,m,ts[50005],k;
bool use[50005];
std::vector<std::vector<int>> V;
void DFS(int N)
{
    use[N]=1;
    for(int i=0; i<(int)V[N].size(); i++)
    {
        if(!use[V[N][i]])
            DFS(V[N][i]);
    }
    ts[++k]=N;
}
int main()
{
    fin>>n>>m;
    V.resize(n+5);
    for(int i=1; i<=m; i++)
    {
        int x,y;
        fin>>x>>y;
        V[x].push_back(y);
    }
    for(int i=1; i<=n; i++)
        if(!use[i])
            DFS(i);
    for(int i=n; i>=1; --i)
        fout<<ts[i]<<" ";
    return 0;
}