#include<stdio.h>
#include<vector>
using namespace std;

vector <int> p[50005];
int a[50005];

void check(int x)
{
printf("%d ",x);

int i,n;
n=p[x].size();
for(i=0;i<n;i++)
    {
    a[p[x][i]]--;
    if(a[p[x][i]]==0)
        check(p[x][i]);
    }
a[x]=-1;
}
int main()
{
freopen("sortaret.in","r",stdin);
freopen("sortaret.out","w",stdout);
int n,m,i,x,y;
scanf("%d%d",&n,&m);
for(i=1;i<=m;i++)
    {scanf("%d%d",&x,&y);
    p[x].push_back(y);
    a[y]++;
    }
for(i=1;i<=n;i++)
    if(a[i]==0)
        check(i);
return 0;
}