#include <fstream>
#include <vector>
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
#define cin fin
#define cout fout
const int nmax=50002;
int n, m;
vector<int> g[nmax], l;
bool viz[nmax];
void citire()
{
    cin>>n>>m;
    int x, y;
    for (int i=1; i<=m; ++i)
        {
            cin>>x>>y;
            g[x].push_back(y);
        }
}
void dfs(int x)
{
    viz[x]=true;
    for (const int &e: g[x])
        if (viz[e]==false) dfs(e);
    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)
        cout<<l[i]<<' ';
    return 0;
}