Compilare: main.cpp: In function 'void solve()': main.cpp:15:18: 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<a.length();i++) | ~^~~~~~~~~~~ main.cpp:17:25: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated] 17 | freva[a[i] - 'a']++; | ~~~~~~~~~~~~~~~~^ main.cpp:18:25: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated] 18 | frevb[b[i] - 'a']++; | ~~~~~~~~~~~~~~~~^