Function vertex_add_subtree_sum_hld 

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

✅ AC 129ms

problem here

Detail

Case Name	Status	Exec Time
example_00	AC	0 ± 0 ms
small_00	AC	0 ± 0 ms
small_01	AC	0 ± 0 ms
small_02	AC	0 ± 0 ms
small_03	AC	0 ± 0 ms
small_04	AC	0 ± 0 ms
random_00	AC	77 ± 11 ms
random_01	AC	97 ± 11 ms
random_02	AC	23 ± 0 ms
random_03	AC	53 ± 4 ms
random_04	AC	28 ± 2 ms
max_random_00	AC	129 ± 10 ms
max_random_01	AC	108 ± 6 ms
max_random_02	AC	111 ± 10 ms
line_00	AC	98 ± 10 ms
line_01	AC	95 ± 5 ms