Main.cc:239: error: ISO C++ forbids initialization of member 'sum'
Main.cc:239: error: making 'sum' static
Main.cc:239: error: ISO C++ forbids in-class initialization of non-const static member 'sum'
Main.cc:239: error: ISO C++ forbids initialization of member 'cnt'
Main.cc:239: error: making 'cnt' static
Main.cc:239: error: ISO C++ forbids in-class initialization of non-const static member 'cnt'
Main.cc: In function 'solution::Node solution::operator+(const solution::Node&, const solution::Node&)':
Main.cc:247: error: too many initializers for 'solution::Node'