#include <fstream>
#include <vector>
#define NMAX 50001
using namespace std;

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

vector <int> G[NMAX];
vector <int> stiva;

int N,M;
bool viz[NMAX];

void dfs(int nod)
{
    viz[nod]=1;
    int i;
    for(i=0;i<G[nod].size();i++)
        if(!viz[G[nod][i]])
            dfs(G[nod][i]);

    stiva.push_back(nod);
}
int main()
{
    f>>N>>M;
    int x,y,i;
    while(M--)
    {
        f>>x>>y;
        G[x].push_back(y);
    }

    for(i=1;i<=N;i++)
        if(!viz[i])
            dfs(i);

    for(i=stiva.size()-1;i>=0;i--)
        g<<stiva[i]<<' ';
}