#include <cstring>
#include <cstdio>
#include <vector>
#include <queue>
#include <algorithm>
#include <cmath>
#define MaxN 50005
using namespace std;
 
FILE*IN,*OUT;
int N,M,Sort[MaxN],X,Y,Size=0;
bool found[MaxN];
vector <int>Graph[MaxN];
void DFS(int node)
{
	found[node]=true;
	for(int i=0;i<Graph[node].size();i++)
		if(!found[Graph[node][i]])DFS(Graph[node][i]);
	Sort[++Size]=node;
}
int main()
{
    IN=fopen("sortaret.in","r");
    OUT=fopen("sortaret.out","w");

	fscanf(IN,"%d%d",&N,&M);

	for(int i=1;i<=M;i++)
	{
		fscanf(IN,"%d%d",&X,&Y);
		Graph[X].push_back(Y);
	}
	for(int i=1;i<=N;i++)
		if(!found[i])
			DFS(i);
	for(int i=N;i>0;i--)
		fprintf(OUT,"%d ",Sort[i]);
	return 0;
}