Compilare: main.cpp: In function 'int main()': main.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i=1;i<s.size();i++) | ~^~~~~~~~~ main.cpp:31:29: warning: comparison of integer expressions of different signedness: 'std::stack<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 31 | else if(temp.size() < size) temp.push(s[i]); | ~~~~~~~~~~~~^~~~~~