#include <cstdio>
#include <vector>
using namespace std;

#define pb push_back
#define forit(it, v) for (__typeof(v.begin()) it = v.begin(); it != v.end(); ++it)

const int MAX_N = 50002;

int n, m, cnt;
int a[MAX_N], t[MAX_N], f[MAX_N];
vector <int> v[MAX_N];

void df(int nod)
{
	if (f[nod])
		return;
	f[nod] = 1;

	forit(it, v[nod])
		df(*it);

	a[++cnt] = nod;
}

int main()
{
	int i;

	freopen("sortaret.in", "r", stdin);
	freopen("sortaret.out", "w", stdout);

	scanf("%d %d", &n, &m);

	for (i = 1; i <= m; ++i)
	{
		int x, y;

		scanf("%d %d", &x, &y);

		v[x].pb(y);
		t[y] = 1;
	}

	for (i = 1; i <= n; ++i)
		if (!t[i])
			df(i);

	for (i = n; i; --i)
		printf("%d ", a[i]);
}