Compilare: main.cpp: In function 'int compare(std::string, std::string)': main.cpp:80:20: warning: array subscript has type 'char' [-Wchar-subscripts] 80 | if (pr[a[i]] < pr[b[i]]) | ^ main.cpp:80:31: warning: array subscript has type 'char' [-Wchar-subscripts] 80 | if (pr[a[i]] < pr[b[i]]) | ^ main.cpp:83:24: warning: array subscript has type 'char' [-Wchar-subscripts] 83 | if (pr[a[i]] > pr[b[i]]) | ^ main.cpp:83:35: warning: array subscript has type 'char' [-Wchar-subscripts] 83 | if (pr[a[i]] > pr[b[i]]) | ^ main.cpp: In function 'int main()': main.cpp:101:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for (int i = 0; i < dict.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:102:19: warning: array subscript has type 'char' [-Wchar-subscripts] 102 | pr[dict[i]] = i; | ^ main.cpp:110:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 110 | for (int i = 1; i < cuv.size(); i++) | ~~^~~~~~~~~~~~