Compilare: main.cpp: In function 'nod* arb(const std::vector<int>&, const std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:34:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = 0 ; i < p.size() ; i++) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:68:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | for(int i = 0 ; i < expresie.size() ; i++) | ~~^~~~~~~~~~~~~~~~~ main.cpp:85:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | while(j < expresie.size() && isdigit(expresie[j])) | ~~^~~~~~~~~~~~~~~~~ main.cpp:67:10: warning: unused variable 't' [-Wunused-variable] 67 | char t; | ^