Compilare: main.cpp: In function 'std::vector<std::pair<int, int> > solve(const string&)': main.cpp:41:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i = 0; i < s.length(); i++) | ~~^~~~~~~~~~~~ main.cpp:61:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for (int i = 0; i < par0.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:66:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int i = 0; i < impar0.size(); i++) | ~~^~~~~~~~~~~~~~~