Compilare: main.cpp: In function 'void suma()': main.cpp:20:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < t.size(); i++) | ~~^~~~~~~~~~ main.cpp:22:20: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | fr[t[i]]++; | ^ main.cpp:23:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | if (i >= s.size()) continue; | ~~^~~~~~~~~~~ main.cpp:24:20: warning: array subscript has type 'char' [-Wchar-subscripts] 24 | fr[s[i]]--; | ^