Compilare: main.cpp: In function 'void update(trieStr*, long long int)': main.cpp:27:9: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | if(i==str.size()) return; | ~^~~~~~~~~~~~ main.cpp:28:21: warning: array subscript has type 'char' [-Wchar-subscripts] 28 | if(t->fii[str[i]] == NULL) | ^ main.cpp:30:22: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | t->fii[str[i]]=new trieStr; | ^ main.cpp:32:18: warning: array subscript has type 'char' [-Wchar-subscripts] 32 | t->fii[str[i]]->wcnt++; | ^ main.cpp:33:25: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | update(t->fii[str[i]], i+1); | ^ main.cpp: In function 'long long int query(trieStr*, long long int)': main.cpp:43:24: warning: array subscript has type 'char' [-Wchar-subscripts] 43 | t=t->fii[str[i]]; | ^ main.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] 46 | } | ^