Compilare: main.cpp: In function 'int main()': main.cpp:27:35: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 27 | if(paranteze1.find(sir[i])!=-1) | ~~~~~~~~~~~~~~~~~~~~~~~^~~~ main.cpp:32:40: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 32 | else if(paranteze2.find(sir[i])!=-1) | ~~~~~~~~~~~~~~~~~~~~~~~^~~~