#include<fstream.h>   
#define MAXN 50001   
ifstream f("sortaret.in");   
ofstream g("sortaret.out");   
  
struct nod{int x;nod *urm;};   
nod *p[MAXN];   
int n,m,nsol;   
int viz[MAXN],sol[MAXN];   
  
void add(int x,int y)   
{   
    nod *q;   
    q=new nod;   
    q->x=y;   
    q->urm=p[x];   
    p[x]=q;   
}   
  
void dfs(int x)   
{   
    nod *q;   
    viz[x]=1;   
    for(q=p[x];q;q=q->urm)   
    if(viz[q->x]==0)   
        dfs(q->x);   
    sol[++nsol]=x;   
}   
  
int main(void)   
{   
    int i,x,y;   
    f>>n>>m;   
    for(i=1;i<=m;i++)   
    {   
        f>>x>>y;   
        add(x,y);   
    }   
    for(i=1;i<=n;i++)   
    if(!viz[i])   
    {   
        dfs(i);   
    }   
    for(i=n;i>=1;i--)   
        g<<sol[i]<<" ";   
    f.close();   
    g.close();   
    return 0;   
}