Compilare: user.cpp: In function ‘int main()’: user.cpp:29:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[sir[i]] ++; ^ user.cpp:36:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(a[j] == ( n - i ) / 2 + 1) ^ user.cpp:44:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(a[j] && j != cant) ^ user.cpp:51:8: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[c]--; ^