#include<cstdio>
#include<queue>
#include<vector>
#include<fstream>
#define NMAX 50001
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
vector<int> v[NMAX];
queue<int> q;
int d[NMAX];
int n,m,i,x,y;
int main()
{
	f>>n>>m;
	for(;m;--m)
	{
		f>>x>>y;
		v[x].push_back(y);
		d[y]++;
	}
	for(i=1;i<=n;i++)
		if(!d[i])
			q.push(i);
	while(!q.empty())
	{
		x=q.front();
		q.pop();
		g<<x<<" ";
		for(size_t i=0;i<v[x].size();i++)
		{	
			y=v[x][i];
			d[y]--;
			if(d[y]==0)
				q.push(y);
		}
	}
	return 0;
}