#include <stdio.h>
#include <stdlib.h>

int *a[50001];
int v[50001];
int n,m,x,y,nr;
int viz[50001];

void dfs(int nod)
{
    int i;
    viz[nod]=1;
    for (i=1;i<=a[nod][0];++i)
         if (!viz[a[nod][i]]) 
              dfs(a[nod][i]);
    v[++nr]=nod;
}          

int main()
{
    int i;
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    
    scanf("%d %d\n", &n,&m);
    for (i=1;i<=n;++i)
    {
        a[i]=(int *) realloc(a[i], sizeof(int));
        a[i][0]=0;
    }
    
    for (i=1;i<=m;++i)
    {
        scanf("%d %d\n", &x,&y);
        a[x][0]++;
        a[x]=(int *) realloc(a[x], (a[x][0]+1)*sizeof(int));
        a[x][a[x][0]]=y;
    }
    
    for (i=1;i<=n;++i)
          if (!viz[i])
              dfs(i);
    
    for (i=n;i>=1;--i)
          printf("%d ", v[i]);
    return 0;
}