Compilare: main.cpp: In function 'int main()': main.cpp:22:17: warning: array subscript has type 'char' [-Wchar-subscripts] f_a[A[i]]++; ^ main.cpp:26:17: warning: array subscript has type 'char' [-Wchar-subscripts] f_b[B[i]]++; ^ main.cpp:38:17: warning: array subscript has type 'char' [-Wchar-subscripts] f_a[B[i]]--; ^ main.cpp:44:20: warning: array subscript has type 'char' [-Wchar-subscripts] if(f_b[A[i]]) ^ main.cpp:46:21: warning: array subscript has type 'char' [-Wchar-subscripts] f_b[A[i]]--; ^ main.cpp:47:46: warning: array subscript has type 'char' [-Wchar-subscripts] while(!st.empty() && f_a[st.top()] && st.top()>A[i]) ^ main.cpp:49:29: warning: array subscript has type 'char' [-Wchar-subscripts] f_b[st.top()]++; ^ main.cpp:50:29: warning: array subscript has type 'char' [-Wchar-subscripts] f_a[st.top()]--; ^ main.cpp:57:21: warning: array subscript has type 'char' [-Wchar-subscripts] f_a[A[i]]--; ^