Compilare: main.cpp: In function 'bool check(int)': main.cpp:11:18: warning: array subscript has type 'char' [-Wchar-subscripts] if (vc [s [0]] < gr) ^ main.cpp:13:45: warning: array subscript has type 'char' [-Wchar-subscripts] int sz = s . size () , p = dp [gr][s [0]]; ^ main.cpp: In function 'int main()': main.cpp:29:21: warning: array subscript has type 'char' [-Wchar-subscripts] ++ vc [A [i]]; ^ main.cpp:30:22: warning: array subscript has type 'char' [-Wchar-subscripts] dp [vc [A [i]]][A [i]] = i; ^ main.cpp:30:30: warning: array subscript has type 'char' [-Wchar-subscripts] dp [vc [A [i]]][A [i]] = i; ^ main.cpp:31:19: warning: array subscript has type 'char' [-Wchar-subscripts] dp2 [A [i]][i] = 1; ^