Compilare: main.cpp: In function 'int32_t main()': main.cpp:62:16: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | ap[s[i]] += 1; | ^ main.cpp:70:23: warning: array subscript has type 'char' [-Wchar-subscripts] 70 | ap[s[s.size() - 1]]++; | ^ main.cpp:72:23: warning: array subscript has type 'char' [-Wchar-subscripts] 72 | ap[s[s.size() - 2]]++; | ^ main.cpp:94:26: warning: array subscript has type 'char' [-Wchar-subscripts] 94 | ret = ap[a[0]]; | ^