1for (int c3 = 1; c3 <= n; c3 += 1)
2  s2(c3);
3for (int c0 = 0; c0 < n - 1; c0 += 1) {
4  for (int c3 = 0; c3 < n - c0 - 1; c3 += 1)
5    s0(c0 + 1, n - c3);
6  for (int c3 = 0; c3 < n - c0 - 1; c3 += 1)
7    for (int c6 = c0 + 2; c6 <= n; c6 += 1)
8      s1(c0 + 1, n - c3, c6);
9}
10for (int c0 = n - 1; c0 < 2 * n - 1; c0 += 1) {
11  if (c0 >= n)
12    for (int c2 = -n + c0 + 2; c2 <= n; c2 += 1)
13      s3(c2, -n + c0 + 1);
14  s4(-n + c0 + 2);
15}
16