Compilare: main.cpp: In function 'int main()': main.cpp:62:14: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | used[x] = used[y] = 1; | ^ main.cpp:62:24: warning: array subscript has type 'char' [-Wchar-subscripts] 62 | used[x] = used[y] = 1; | ^ main.cpp:63:14: warning: array subscript has type 'char' [-Wchar-subscripts] 63 | dout[x]++; din[y]++; | ^ main.cpp:63:24: warning: array subscript has type 'char' [-Wchar-subscripts] 63 | dout[x]++; din[y]++; | ^ main.cpp:64:11: warning: array subscript has type 'char' [-Wchar-subscripts] 64 | L[x].push_back(y); | ^