1 for (int c0 = 0; c0 <= M; c0 += 1) { 2 for (int c1 = 0; c1 <= min(N, c0); c1 += 1) { 3 S1(c0, c1); 4 S2(c0, c1); 5 } 6 for (int c1 = max(0, N + 1); c1 <= c0; c1 += 1) 7 S1(c0, c1); 8 for (int c1 = c0 + 1; c1 <= N; c1 += 1) 9 S2(c0, c1); 10 } 11