Compilare: main.cpp: In function 'int main()': main.cpp:26:16: warning: array subscript has type 'char' [-Wchar-subscripts] sk[a[i]] ++; ^ main.cpp:29:16: warning: array subscript has type 'char' [-Wchar-subscripts] sk[b[i]] --; ^ main.cpp:30:16: warning: array subscript has type 'char' [-Wchar-subscripts] nd[b[i]] ++; ^ main.cpp:40:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(nd[a[i]] > 0) { ^ main.cpp:41:58: warning: array subscript has type 'char' [-Wchar-subscripts] while(k > 0 && a[st[k]] > a[i] && sk[a[st[k]]] > 0) { ^ main.cpp:42:28: warning: array subscript has type 'char' [-Wchar-subscripts] sk[a[st[k]]] --; ^ main.cpp:43:28: warning: array subscript has type 'char' [-Wchar-subscripts] nd[a[st[k]]] ++; ^ main.cpp:47:20: warning: array subscript has type 'char' [-Wchar-subscripts] nd[a[i]] --; ^