1 | if (M >= 0 && N >= 0) |
2 | for (int c0 = -4; c0 <= 3 * M + N; c0 += 1) { |
3 | if (3 * M >= c0 + 4 && (c0 + 1) % 3 == 0) { |
4 | S1((c0 + 4) / 3, 0); |
5 | } else if (c0 >= 3 * M) { |
6 | S2(M, -3 * M + c0); |
7 | } |
8 | for (int c1 = max(-3 * M + c0 + 3, (c0 + 6) % 3); c1 <= min(N - 1, c0); c1 += 3) { |
9 | S2((c0 - c1) / 3, c1); |
10 | S1(((c0 - c1) / 3) + 1, c1 + 1); |
11 | } |
12 | if (N >= c0 + 4 && c0 >= -3) { |
13 | S1(0, c0 + 4); |
14 | } else if (3 * M + N >= c0 + 3 && c0 >= N && (N - c0) % 3 == 0) { |
15 | S2((-N + c0) / 3, N); |
16 | } |
17 | for (int c1 = max(-3 * M + c0, (c0 + 6) % 3); c1 <= min(N, c0); c1 += 3) |
18 | S3((c0 - c1) / 3, c1); |
19 | } |
20 | |