#include <cstdio>
#include <vector>
using namespace std;

int n,m;
vector <int> succ[50050], init;
int grin[50050];

void citire()
{
	freopen ("sortaret.in","r",stdin);
	freopen ("sortaret.out","w",stdout);
	scanf("%d%d",&n,&m);
	int x,y;
	for (int i=1;i<=m;++i)
	{
		scanf("%d%d",&x,&y);
		succ[x].push_back(y);
		grin[y]++;
	}
	for (int i=1;i<=n;++i)
		if (!grin[i])
			init.push_back(i);
}

void dfs(int nod)
{
	printf("%d ",nod);
	for (int i=0;i<succ[nod].size();++i)
	{
		grin[succ[nod][i]]--;
		if (!grin[succ[nod][i]])
			dfs(succ[nod][i]);
	}
}

int main()
{
	citire();
	for (int i=0;i<init.size();++i)
		dfs(init[i]);
	return 0;
}