#include <bits/stdc++.h>

using namespace std;

#define int long long

inline int read ()
{
	int x = 0, f = 1;
	char ch = getchar ();
	while ('0' > ch ||  '9' < ch)
	{
		if (ch == '-')
			f = -1;
		ch = getchar ();
	}
	while (ch <= '9' &&  '0' <= ch)
	{
		x = (ch ^ 48) + (x << 3) + (x << 1);
		ch = getchar ();
	}
	return x * f;
}

int n, a, b;

signed main ()
{
	cin >> n >> a >> b;
	if (a * b < n || a + b - 1 > n)
	{
		cout << -1 << '\n';
		return 0;
	}
	for (int t = min(a, n - b + 1); n > 0; n -= t, --b, t = min(a, n - b + 1))
		for (int i = n - t + 1; i <= n; ++ i)
			cout << i << ' ';
	return 0;
}