#include <fstream>
#include <vector>
using namespace std;
#define NMAX 50005

vector <int> v[NMAX];
int c[NMAX], n, m, af[NMAX], k;
bool viz[NMAX];

ifstream fin("sortaret.in");
ofstream fout("sortaret.out");

void read()
{
     fin>>n>>m;
     for(int i=1; i<=m; i++)
     {
     int x, y;
     fin>>x>>y;
     v[x].push_back(y);
     }
}

void dfs(int nod)
{
    viz[nod]=true;
    for(unsigned int i=0; i<v[nod].size(); i++)
    {
    int nnod=v[nod][i];
    if(!viz[nnod])
    dfs(nnod);
    }
    af[++k]=nod;
}

int main()
{
    read();
    for(int i=1; i<=n; i++)
    {
    if(!viz[i]) dfs(i);
    }
    for(int i=n; i>=1; i--)
    fout<<af[i]<<" ";
}