Compilare: main.cpp: In function 'void cht()': main.cpp:43:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<panta>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i = 0; i < stk.size() - 1; i++) | ~~^~~~~~~~~~~~~~~~