Compilare: main.cpp: In function 'int main()': main.cpp:21:15: warning: array subscript has type 'char' [-Wchar-subscripts] M[s[i]] = max(M[s[i]], maxx + 1); ^ main.cpp:21:29: warning: array subscript has type 'char' [-Wchar-subscripts] M[s[i]] = max(M[s[i]], maxx + 1); ^ main.cpp:27:15: warning: array subscript has type 'char' [-Wchar-subscripts] m[s[i]] = max(m[s[i]], maxx + 1); ^ main.cpp:27:29: warning: array subscript has type 'char' [-Wchar-subscripts] m[s[i]] = max(m[s[i]], maxx + 1); ^