1*52a25237STobias Grosser for (int c0 = 1; c0 < n; c0 += 4) 2*52a25237STobias Grosser for (int c1 = c0 + 1; c1 <= n; c1 += 6) 3*52a25237STobias Grosser s0(c0, c1); 4