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