Compilare: main.cpp: In member function 'void Solution::rec_solve()': main.cpp:49:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | if (left == 0 && right == vec.size() - 1) | ~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:76:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | } else if (pos < posmax && right != vec.size() - 1) { | ~~~~~~^~~~~~~~~~~~~~~~~