1 for (int c0 = 1; c0 < n; c0 += 1) {
2   for (int c2 = c0 + 1; c2 <= n; c2 += 1)
3     S1(c0, c2);
4   for (int c1 = 1; c1 < c0; c1 += 1)
5     for (int c2 = c1 + 1; c2 <= n; c2 += 1)
6       S2(c1, c2, c0);
7 }
8 for (int c1 = 1; c1 < n; c1 += 1)
9   for (int c2 = c1 + 1; c2 <= n; c2 += 1)
10     S2(c1, c2, n);
11