Compilare: main.cpp: In constructor 'Path::Path(int, int, std::vector<int>)': main.cpp:119:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 119 | for (int ind = 0; ind < vec.size(); ind++) | ~~~~^~~~~~~~~~~~ main.cpp: In function 'std::vector<int> dfs(int, int, int)': main.cpp:179:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 179 | if (i.size() == maxx && found == 0) | ~~~~~~~~~^~~~~~~ main.cpp: In function 'int main()': main.cpp:300:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 300 | for (int ind = 0; ind < i.size(); ind++) | ~~~~^~~~~~~~~~ main.cpp: In member function 'int aint::query(int, int, int, int, int)': main.cpp:74:9: warning: 'nonnull' argument 'this' compared to NULL [-Wnonnull-compare] 74 | if (this == nullptr) | ^~