#include <fstream>
#include <vector>

int N;
std::vector<int> G[50001];
std::vector<int> S;

int viz[50001];

void dfs(int k) {
	viz[k] = 1;

	for (auto& nod : G[k]) {
		if (viz[nod] == 0)
			dfs(nod);
	}

	S.push_back(k);
}

int main() {
	std::ifstream fin("sortaret.in");
	std::ofstream fout("sortaret.out");

	int M;
	fin >> N >> M;

	int x, y;

	for (int i = 0; i < M; ++i) {
		fin >> x >> y;

		G[x].push_back(y);
	}

	fin.close();

	for (int i = 1; i <= N; ++i) {
		if (viz[i] == 0)
			dfs(i);
	}

	for (auto&& it = S.rbegin(); it != S.rend(); ++it)
		fout << *it << ' ';
	fout << '\n';

	return 0;
}