20 lines · c
1if (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