1 for (int c0 = 0; c0 <= n; c0 += 1) 2 for (int c1 = 0; c1 <= n; c1 += 1) 3 if (c1 == n || c0 == n || c1 == 0 || c0 == 0) { 4 for (int c3 = 0; c3 <= n; c3 += 1) 5 for (int c4 = 0; c4 <= n; c4 += 1) 6 a(c0, c1, c3, c4); 7 for (int c3 = 0; c3 <= n; c3 += 1) 8 for (int c4 = 0; c4 <= n; c4 += 1) 9 b(c0, c1, c3, c4); 10 } 11