Compilare: main.cpp: In function 'void Insert(std::string)': main.cpp:23:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i = 0;i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp:25:34: warning: array subscript has type 'char' [-Wchar-subscripts] 25 | int nex = Tree[s].Go[a[i]]; | ^ main.cpp:30:28: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | Tree[s].Go[a[i]] = nodes; | ^ main.cpp:31:28: warning: array subscript has type 'char' [-Wchar-subscripts] 31 | Tree[s].fr[a[i]]++; | ^ main.cpp:35:28: warning: array subscript has type 'char' [-Wchar-subscripts] 35 | Tree[s].fr[a[i]]++,s = nex; | ^ main.cpp: In function 'void Delete(std::string)': main.cpp:42:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i = 0;i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp:44:34: warning: array subscript has type 'char' [-Wchar-subscripts] 44 | int nex = Tree[s].Go[a[i]]; | ^ main.cpp:45:28: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | if(!Tree[s].fr[a[i]]) return; | ^ main.cpp:49:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int i = 0;i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp:51:34: warning: array subscript has type 'char' [-Wchar-subscripts] 51 | int nex = Tree[s].Go[a[i]]; | ^ main.cpp:52:24: warning: array subscript has type 'char' [-Wchar-subscripts] 52 | Tree[s].fr[a[i]]--; | ^ main.cpp:41:15: warning: unused variable 'cnt' [-Wunused-variable] 41 | int s = 0,cnt = 0; | ^~~ main.cpp: In function 'int Occur(std::string)': main.cpp:59:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i = 0;i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp:61:38: warning: array subscript has type 'char' [-Wchar-subscripts] 61 | ans = min(ans,Tree[s].fr[a[i]]); | ^ main.cpp:62:28: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | s = Tree[s].Go[a[i]]; | ^ main.cpp: In function 'int prefix(std::string)': main.cpp:72:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]