Compilare: main.cpp: In function 'bool cmp2(const char&, const char&)': main.cpp:34:22: warning: array subscript has type 'char' [-Wchar-subscripts] return cmp(ww[lsh],ww[rsh]); ^ main.cpp:34:30: warning: array subscript has type 'char' [-Wchar-subscripts] return cmp(ww[lsh],ww[rsh]); ^ main.cpp: In function 'void read_data()': main.cpp:66:15: warning: array subscript has type 'char' [-Wchar-subscripts] w[v[i]]=i+1; ^ main.cpp:76:14: warning: array subscript has type 'char' [-Wchar-subscripts] G[w[x]].push_back(w[y]); ^ main.cpp:76:30: warning: array subscript has type 'char' [-Wchar-subscripts] G[w[x]].push_back(w[y]); ^ main.cpp:77:15: warning: array subscript has type 'char' [-Wchar-subscripts] Gt[w[y]].push_back(w[x]); ^ main.cpp:77:31: warning: array subscript has type 'char' [-Wchar-subscripts] Gt[w[y]].push_back(w[x]); ^ main.cpp:79:22: warning: array subscript has type 'char' [-Wchar-subscripts] ++int_drg[w[y]]; ^ main.cpp:80:22: warning: array subscript has type 'char' [-Wchar-subscripts] ++ext_drg[w[x]]; ^