Compilare: user.cpp: In function ‘long long int Add(bool, int, long long int)’: user.cpp:53:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] ret = cntFlipped * sum[n][flip(vipCh)] + cntNormal * sum[n][vipCh]; ^ user.cpp:53:68: warning: array subscript has type ‘char’ [-Wchar-subscripts] ret = cntFlipped * sum[n][flip(vipCh)] + cntNormal * sum[n][vipCh]; ^ user.cpp:56:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] ret = (sum[n][vipCh] + sum[n][flip(vipCh)]) * lg / (8 * n); ^ user.cpp:56:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] ret = (sum[n][vipCh] + sum[n][flip(vipCh)]) * lg / (8 * n); ^ user.cpp: In function ‘long long int Letter(long long int, long long int, bool)’: user.cpp:71:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] return sum[p][flip(vipCh)]; ^ user.cpp:76:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] return sum[p][vipCh]; ^ user.cpp:90:1: warning: control reaches end of non-void function [-Wreturn-type] } ^