Compilare: main.cpp: In function 'int main()': main.cpp:15:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i = 0; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp:35:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::map<char, int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i = 2; i <= m.size(); ++i) | ~~^~~~~~~~~~~ main.cpp:37:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::map<char, int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for (int i = 2; i <= (m.size() - n); ++i) | ~~^~~~~~~~~~~~~~~~~