#include <fstream>
#include <vector>
using namespace std;
ifstream cin("sortaret.in");
ofstream cout("sortaret.out");
const int nmax=50000;
int stiva[nmax+5],vf,use[nmax+5];
vector<int>v[nmax+5];
int n,m;
void dfs(int nod)
{
	use[nod]=1;
	for(int i=0;i<v[nod].size();i++)
		if(use[v[nod][i]]==0)
			dfs(v[nod][i]);
	stiva[++vf]=nod;
}
int main()
{
	cin>>n>>m;
	while(m--)
	{
		int a,b;
		cin>>a>>b;
		v[a].push_back(b);
	}
	for(int i=1;i<=n;i++)
		if(use[i]==0)
			dfs(i);
	for(int i=vf;i>=1;i--)
		cout<<stiva[i]<<" ";
    return 0;
}
/**

**/