1{ 2 for (int c0 = a; c0 <= min(b, a + 9); c0 += 1) 3 s0(c0); 4 for (int c0 = a + 10; c0 <= min(b, a + 19); c0 += 1) { 5 s0(c0); 6 s1(c0); 7 } 8 for (int c0 = max(a + 10, b + 1); c0 <= min(b + 10, a + 19); c0 += 1) 9 s1(c0); 10 for (int c0 = a + 20; c0 <= b; c0 += 1) { 11 s0(c0); 12 s1(c0); 13 s2(c0); 14 } 15 for (int c0 = max(a + 20, b + 1); c0 <= b + 10; c0 += 1) { 16 s1(c0); 17 s2(c0); 18 } 19 for (int c0 = max(a + 20, b + 11); c0 <= b + 20; c0 += 1) 20 s2(c0); 21} 22