#include<cstdio>
#include<vector>
#define nmax 50005
using namespace std;
int n,m;
vector <int> a[nmax];
bool use[nmax];
void DF(int nod)
{
    vector <int> ::iterator it;
    use[nod]=1;
    for(it=a[nod].begin();it!=a[nod].end();it++)
        if(!use[*it])
            DF(*it);
    a[0].push_back(nod);
}
int main()
{
    vector <int> ::iterator it;
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    scanf("%d %d",&n,&m);
    int i,x,y;
    for(i=1;i<=m;i++)
    {
        scanf("%d %d",&x,&y);
        a[x].push_back(y);
    }
    for(i=1;i<=n;i++)
        if(!use[i])
            DF(i);
    for(it=a[0].end()-1;it!=a[0].begin();it--)
        printf("%d ",*it);
    printf("%d\n",*it);
    return 0;
}