#include <fstream>
#include <vector>

using namespace std;

ifstream cin("sortaret.in");
ofstream cout("sortaret.out");

const int NMAX=5e4+5;
int n, m, viz[NMAX];
vector<int> adj[NMAX], srt;

void DFS(int u)
{
    viz[u]=1;
    for(auto v:adj[u])
        if(!viz[v])
            DFS(v);
    srt.push_back(u);
}

int main()
{
    cin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int a, b; cin>>a>>b;
        adj[a].push_back(b);
    }
    for(int i=1;i<=n;i++)
        if(!viz[i])
            DFS(i);
    for(int i=srt.size()-1;i>=0;i--)
        cout<<srt[i]<<" ";
    return 0;
}