#include <cstdio>
#include <vector>
#define N 50003
using namespace std;
int q[N],ul;
int viz[N];
vector <int> a[N];
int n,m;
void R()
{
    freopen("sortaret.in","r",stdin);
    scanf("%d %d",&n,&m);
    int x,y;
    for(int i=1; i<=m; i++)
    {
        scanf("%d %d",&x,&y);
        a[x].push_back(y);
    }
}
typedef vector <int>:: iterator IT;
void DFS(int nod)
{
    viz[nod]=1;
    int son;
    for(IT it=a[nod].begin(); it!=a[nod].end(); it++)
    {
        son=*it;
        if(viz[son]==0)
        {
            DFS(son);

        }
    }
    viz[nod]=2;
    q[++ul]=nod;
}

int main()
{
    R();
    int i;
    for(i=1; i<=n; i++)
        if(viz[i]==0)
        DFS(i);
    freopen("sortaret.out","w",stdout);
    for(i=ul; i>=1; i--)
        printf("%d ",q[i]);
    return 0;
}