Function number_of_substrings 

pub fn number_of_substrings(reader: impl Read, writer: impl Write)

✅ AC 59ms

problem here

Detail

Case Name	Status	Exec Time
example_00	AC	0 ± 0 ms
example_01	AC	0 ± 0 ms
example_02	AC	0 ± 0 ms
example_03	AC	0 ± 0 ms
random_00	AC	45 ± 4 ms
random_01	AC	54 ± 2 ms
random_02	AC	3 ± 0 ms
random_03	AC	49 ± 1 ms
random_04	AC	29 ± 1 ms
max_random_00	AC	58 ± 2 ms
max_random_01	AC	59 ± 2 ms
max_random_02	AC	58 ± 2 ms
max_random_03	AC	58 ± 2 ms
max_random_04	AC	57 ± 1 ms
all_same_00	AC	13 ± 1 ms
all_same_01	AC	13 ± 0 ms
all_same_02	AC	13 ± 0 ms
all_same_03	AC	13 ± 1 ms
all_same_04	AC	13 ± 0 ms
fib_str_00	AC	30 ± 2 ms
fib_str_01	AC	20 ± 0 ms
fib_str_02	AC	21 ± 0 ms
fib_str_03	AC	16 ± 0 ms
fib_str_04	AC	31 ± 1 ms