1#if 1
2. right
3
4# if 1
5.. right
6# elif 1
7.. wrong
8# elif 0
9.. wrong
10# else
11.. wrong
12# endif
13
14#elif 1
15. wrong
16
17# if 1
18.. wrong
19# elif 1
20.. wrong
21# elif 0
22.. wrong
23# else
24.. wrong
25# endif
26
27#elif 0
28. wrong
29
30# if 1
31.. wrong
32# elif 1
33.. wrong
34# elif 0
35.. wrong
36# else
37.. wrong
38# endif
39
40#else
41. wrong
42
43# if 1
44.. wrong
45# elif 1
46.. wrong
47# elif 0
48.. wrong
49# else
50.. wrong
51# endif
52
53#endif
54