Compilare: main.cpp: In static member function 'static std::unordered_map<long unsigned int, std::__cxx11::basic_string<char> > CodesMachine::getPrefixCodes(Vertex*)': main.cpp:103:34: warning: comparison of integer expressions of different signedness: 'uint64_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 103 | if(head.first->getChar() == -1) { | ~~~~~~~~~~~~~~~~~~~~~~^~~~~ main.cpp: In function 'Vertex* getHuffmanTree(const std::unordered_map<long unsigned int, long unsigned int>&)': main.cpp:10:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::unordered_map<long unsigned int, long unsigned int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | #define forRange(a, b) for(int it = a; it < b; it++) | ~~~^~~~~~~~~~ 11 | | 12 | using namespace std; | ~~~~~~~~~~~~~~~~~~~~ 13 | | 14 | class Vertex { | ~~~~~~~~~~~~~~ 15 | public: | ~~~~~~~ 16 | virtual uint64_t getFreq() = 0; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 17 | virtual uint64_t getChar() = 0; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 18 | virtual Vertex* getLeftChild() = 0; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 19 | virtual Vertex* getRightChild() = 0; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 20 | }; | ~~ 21 | | 22 | class Nil : public Vertex { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~ 23 | public: | ~~~~~~~ 24 | uint64_t getFreq() override; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 25 | uint64_t getChar() override; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 26 | Vertex* getLeftChild() override; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 27 | Vertex* getRightChild() override; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 28 | }; | ~~ 29 | | 30 | class Node : public Vertex { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 31 | private: | ~~~~~~~~