#include<cstdio>
#include<cstdlib>
using namespace std;
int* gr[50001];
int pord[50001];
bool viz[50001];
void df(int vf)
{
	int i;
	viz[vf]=1;
	for(i=1;i<=gr[vf][0];i++)
		if(!viz[gr[vf][i]])
			df(gr[vf][i]);
	pord[0]++;
	pord[pord[0]]=vf;
}
int main()
{
	int n,m,i,x,y;
	freopen("sortaret.in","r",stdin);
	scanf("%d %d\n",&n,&m);
	for(i=1;i<=n;i++)
	{
		gr[i]=(int*)realloc(gr[i],4);
		gr[i][0]=0;
	}
	for(i=1;i<=m;i++)
	{
		scanf("%d %d\n",&x,&y);
		gr[x][0]++;
		gr[x]=(int*)realloc(gr[x],(gr[x][0]+1)*4);
		gr[x][gr[x][0]]=y;
	}
	fclose(stdin);
	for(i=1;i<=n;i++)
		if(!viz[i])
			df(i);
	freopen("sortaret.out","w",stdout);
	for(i=n;i>0;i--)
		printf("%d ",pord[i]);
	printf("\n");
	fclose(stdout);
	return 0;
}