Compilare: main.cpp: In function 'bool highpriority()': main.cpp:55:33: warning: array subscript has type 'char' [-Wchar-subscripts] 55 | r = val[ s[i] ]; | ~~~^ main.cpp: In function 'int main()': main.cpp:77:17: warning: array subscript has type 'char' [-Wchar-subscripts] 77 | val[ a[j] ] = !val[ a[j] ]; | ~~~^ main.cpp:77:32: warning: array subscript has type 'char' [-Wchar-subscripts] 77 | val[ a[j] ] = !val[ a[j] ]; | ~~~^