Problem	promotion
User	maomao
Submission Time	2025-11-28 17:26:11
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

promotion.cpp: In function ‘int main()’:
promotion.cpp:44:12: error: ‘__gnu_cxx::__alloc_traits<std::allocator<std::vector<long long int> >, std::vector<long long int> >::value_type’ {aka ‘class std::vector<long long int>’} has no member named ‘pb’
44 | child[p].pb(i);
| ^~