Compilare: user.cpp: In function ‘int cnt(int, int)’: user.cpp:38:30: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(v[p1]&(1<<bit)!=v[p2]&(1<<bit)) ~~~~~~~~^~~~~~~ user.cpp: In function ‘int main()’: user.cpp:79:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("invsort.in","r",stdin); ^ user.cpp:80:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("invsort.out","w",stdout); ^