# include <vector>
# include <stdio.h>
using namespace std;
vector <int> v[51000];
int i,j,n,m,x,y,f[51000],d[51000],st[51000],nr,p;
bool viz[51000];
void dfs(int x)
{
	viz[x]=true;
	d[x]=++nr;
	for (vector <int> :: iterator it=v[x].begin(); it!=v[x].end(); ++it)
		if (viz[*it]==false)
			dfs(*it);
	f[x]=++nr;
	st[++p]=x;
}
int main()
{
	freopen("sortaret.in","r",stdin);
	freopen("sortaret.out","w",stdout);
	scanf("%d %d\n",&n,&m);
	for (i=1; i<=m; i++)
	{
		scanf("%d %d\n",&x,&y);
		v[x].push_back(y);
	}
	nr=0;
	for (i=1; i<=n; i++)
		if (viz[i]==false) dfs(i);
	for (i=n; i>=1; i--)
		printf("%d ",st[i]);
	printf("\n");
	return 0;
}