Compilare: user.cpp: In function ‘char query(i64, i64, bool)’: user.cpp:35:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= sum[pos][str[pos]]; ^ user.cpp:42:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= !flipped ? sum[n - 1][ch] + 2 * sum[n - 1][flipper(ch)] : sum[n - 1][ch] * 2 + sum[n - 1][flipper(ch)]; ^ user.cpp:42:64: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= !flipped ? sum[n - 1][ch] + 2 * sum[n - 1][flipper(ch)] : sum[n - 1][ch] * 2 + sum[n - 1][flipper(ch)]; ^ user.cpp:42:81: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= !flipped ? sum[n - 1][ch] + 2 * sum[n - 1][flipper(ch)] : sum[n - 1][ch] * 2 + sum[n - 1][flipper(ch)]; ^ user.cpp:42:111: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= !flipped ? sum[n - 1][ch] + 2 * sum[n - 1][flipper(ch)] : sum[n - 1][ch] * 2 + sum[n - 1][flipper(ch)]; ^ user.cpp:44:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= ((sum[n - 1][ch] + sum[n - 1][flipper(ch)]) * (len / n / 8)) * 3; ^ user.cpp:44:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= ((sum[n - 1][ch] + sum[n - 1][flipper(ch)]) * (len / n / 8)) * 3; ^ user.cpp:50:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= sum[n - 1][ch] + sum[n - 1][flipper(ch)]; ^ user.cpp:50:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= sum[n - 1][ch] + sum[n - 1][flipper(ch)]; ^ user.cpp:52:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= ((sum[n - 1][ch] + sum[n - 1][flipper(ch)]) * (len / n / 8)) * 2; ^ user.cpp:52:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= ((sum[n - 1][ch] + sum[n - 1][flipper(ch)]) * (len / n / 8)) * 2; ^ user.cpp:58:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= flipped ? sum[n - 1][ch] : sum[n - 1][flipper(ch)]; ^ user.cpp:58:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= flipped ? sum[n - 1][ch] : sum[n - 1][flipper(ch)]; ^ user.cpp:60:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= ((sum[n - 1][ch] + sum[n - 1][flipper(ch)]) * (len / n / 8)) * 1; ^ user.cpp:60:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] ant+= ((sum[n - 1][ch] + sum[n - 1][flipper(ch)]) * (len / n / 8)) * 1; ^ user.cpp:65:37: warning: control reaches end of non-void function [-Wreturn-type] return query(pos, len / 4, flip); } ^