Compilare: user.cpp: In function ‘int p(int)’: user.cpp:134:32: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] ant += 1 << lg - i - 1; ^ user.cpp: In function ‘int main()’: user.cpp:158:39: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] ant = 2LL * ant + (1LL<<lg-1) * ((1LL<<lg-1)+1) / 2; ^ user.cpp:158:54: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] ant = 2LL * ant + (1LL<<lg-1) * ((1LL<<lg-1)+1) / 2; ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:15:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^