#include <cstdio>
#include <vector>
#include <stack>
#include <iostream>

using namespace std;

#define NMAX 100005

int N, M;
vector<int> neigh[NMAX];
vector<int> sortaret;

void read_file(){
	int a,b;
	FILE * f = fopen("sortaret.in", "rt");
	fscanf(f, "%d %d", &N, &M);
	for(int i = 0; i < M; ++i){
		fscanf(f, "%d %d", &a, &b);
		neigh[a].push_back(b);
	}
	fclose(f);
}

vector<int> visited;

void dfs(int node){
	visited[node] = 1;
	for(unsigned i = 0; i < neigh[node].size(); ++i)
		if(!visited[neigh[node][i]])
			dfs(neigh[node][i]);
	sortaret.insert(sortaret.begin(), node);
}

void dfs_1(){
	for(int i = 1; i <= N; ++i)
		if(!visited[i])
			dfs(i);
}

void print_sol(){
	FILE * f = fopen("sortaret.out", "wt");
	for(unsigned i = 0; i < sortaret.size(); ++i)
		fprintf(f, "%d ", sortaret[i]);	
	fclose(f);	
}

int main(){
	read_file();
	visited.resize(N+1);
	dfs_1();
	print_sol();
	return 0;
}