Compilare: main.cpp: In function 'int main()': main.cpp:14:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int i = 0; i < s.length(); ++i){ | ~~^~~~~~~~~~~~ main.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | if(i < s.length()-1 && s[i+1] == '*'){ | ~~^~~~~~~~~~~~~~ main.cpp:43:44: warning: suggest parentheses around comparison in operand of '|' [-Wparentheses] 43 | if(q.empty() | q.top() == '['){ | ~~~~~~~~^~~~~~