Compilare: main.cpp: In function 'std::vector<int> unite()': main.cpp:28:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | while(idx<s.size() && s[idx]=='+') | ~~~^~~~~~~~~ main.cpp: In function 'std::vector<int> intersect()': main.cpp:42:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | while(idx<s.size() && s[idx]=='*') | ~~~^~~~~~~~~ main.cpp: In function 'std::vector<int> aux()': main.cpp:68:1: warning: control reaches end of non-void function [-Wreturn-type] 68 | } | ^