#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
vector<int>v[50005];
int m,n,start,marcat[50005],k,f[50005],ans[50005];
void fill1(int i)
{
    marcat[i]=1;
    for(int j=0;j<v[i].size();j++)
    {
        if(marcat[v[i][j]]==0)
        {
            fill1(v[i][j]);
        }
    }
    k++;
    ans[k]=i;
}
int main()
{
    cin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int x,y;
        cin>>x>>y;
        v[x].push_back(y);
        f[y]++;
    }
    for(int i=1;i<=n;i++)
    {
        if(f[i]==0)
        {
            fill1(i);
        }
    }
    for(int i=k;i>=1;i--)
        cout<<ans[i]<<" ";
    return 0;
}