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



int main()
{
    freopen("sortaret.in","rt",stdin);
    freopen("sortaret.out","wt",stdout);
    citire();
    for(int u=1; u<=n; u++)
        if(!viz[u]) {
            L.push_back(u);
            vizitare(u);
        }

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