Compilare: user.cpp: In function ‘long long int solve2(int, long long int, char, bool)’: user.cpp:47:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] return sp[pos][get(ch)]; ^ user.cpp:48:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] return sp[pos][get(change(ch))]; ^ user.cpp:51:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] ll cnt0 = sp[k][get(ch)], cnt1 = sp[k][get(change(ch))]; ^ user.cpp:51:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] ll cnt0 = sp[k][get(ch)], cnt1 = sp[k][get(change(ch))]; ^ user.cpp: In function ‘int main()’: user.cpp:82:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] sp[i][get(str[i])]++; ^ user.cpp:77:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&k,&q); ^ user.cpp:78:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%s " ,str + 1); ^ user.cpp:86:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld " ,&pos); ^