submit D.cpp to 'D - Knapsack Queries on a tree' (tokiomarine2020) [C++ (GCC 9.2.1)]
submit D.cpp to 'D - Knapsack Queries on a tree' (tokiomarine2020) [C++ (GCC 9.2.1)]

kazunetakahashi/atcoder,kazunetakahashi/atcoder