#include <iostream>
#include <fstream>
#include <vector>
#define nmax 50005
using namespace std;
vector<int> vec[nmax],L;
int n,m,viz[nmax],k;
void citire()
{
    int x,y;
    scanf("%d%d",&n,&m);
    for(int i=1; i<=m; i++)
    {
        scanf("%d%d",&x,&y);
        vec[x].push_back(y);
    }
}

void vizitare(int u)
{
    if(viz[u])
        return;
    viz[u]=1;
    for(int i=0;i<vec[u].size();++i)
        vizitare(vec[u][i]);
    L.push_back(u);
}

int main()
{
    freopen("sortaret.in","rt",stdin);
    freopen("sortaret.out","wt",stdout);
    citire();
    for(int u = 1; u <= n; u++)
        vizitare(u);

    for(int i=L.size()-1;i>=0;i--)
        cout<<L[i]<<' ';
    cout<<'\n';
}