Compilare: main.cpp: In function 'int init_hash(int, int, std::string)': main.cpp:25:29: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | ans=(ans*62+val[s[i]])%mod; | ^ main.cpp: In function 'bool egale(std::string, std::string)': main.cpp:41:18: 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<a.size();i++) | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:34: warning: array subscript has type 'char' [-Wchar-subscripts] 58 | hs=hs+mod-(1LL*q*val[s[i]])%mod; | ^ main.cpp:59:32: warning: array subscript has type 'char' [-Wchar-subscripts] 59 | hs=hs*62%mod+val[s[i+m]]; hs%=mod; | ^