13 lines · c
1for (int c0 = 1; c0 <= M; c0 += 1) {2 for (int c1 = 1; c1 <= min(M, c0 + 1); c1 += 1)3 S1(c0, c1);4 if (M >= c0 + 2) {5 S1(c0, c0 + 2);6 S2(c0, c0 + 2);7 }8 for (int c1 = c0 + 3; c1 <= M; c1 += 1)9 S1(c0, c1);10 if (c0 + 1 >= M)11 S2(c0, c0 + 2);12}13