#include <fstream>
#include <vector>
using namespace std;
const int NMAX=50000;

int n,m;
vector<int>G[NMAX+1],L;
bool viz[NMAX+1];

ifstream f("sortaret.in");
ofstream g("sortaret.out");

void citire()
{
    int x,y;
    f>>n>>m;
    while(m--)
    {
        f>>x>>y;
        G[x].push_back(y);
    }
}

void DFS(int x)
{
    viz[x]=1;
    for(const auto &y:G[x])
        if(viz[y]==0)
            DFS(y);
    L.push_back(x);
}

int main()
{
    citire();
    for(int i=1;i<=n;i++)
        if(viz[i]==0)
            DFS(i);
    for(int i=L.size()-1;i>=0;i--)
        g<<L[i]<<' ';
    f.close();
    g.close();
    return 0;
}