#include <cstdio>
#include <vector>

using namespace std;

#define file_in "sortaret.in"
#define file_out "sortaret.out"

int N,M,a,b,i,ord[101000];
vector<int> G[101000];
int viz[1010000];

void dfs(int nod){
	
	viz[nod]=1;
	
	vector<int> :: iterator it;
	
	for (it=G[nod].begin();it!=G[nod].end();++it)
		if (!viz[*it]) dfs(*it);
	
	ord[++ord[0]]=nod;
}

int main(){
	
	freopen(file_in,"r",stdin);
	freopen(file_out,"w",stdout);
	
	scanf("%d %d", &N, &M);
	for (i=1;i<=M;++i){
		
		scanf("%d %d", &a, &b);
		
		G[a].push_back(b);
	}
	
	for (i=1;i<=N;++i)
		 if (!viz[i])
			  dfs(i);
		 
	for (i=ord[0];i>=1;--i)
         printf("%d ", ord[i]);

	return 0;
	
}