#include <fstream>
#include <vector>
#include <stack>
using namespace std;

ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
vector <int> G[100001],rez[100001],GT[100001];
int viz[100001],n,m,ctc;
vector <int> s;
void DFS(int start)
{
    viz[start]=1;
    s.push_back(start);
    for(unsigned int i=0; i<G[start].size(); ++i)
        if(!viz[G[start][i]])
        {
            DFS(G[start][i]);
        }
}

int main()
{
    cin>>n>>m;
    while(m--)
    {
        int x,y;
        cin>>x>>y;
        G[x].push_back(y);
    }
    for(int i=1;i<=n;++i)
        if(!viz[i])
            DFS(i);
    for(auto it=s.begin(); it!=s.end(); it++)
        cout<<*it<<' ';
    return 0;
}