Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:2:27: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define zeros(x) (x^(x-1) & x) ^ user.cpp:8:27: note: in expansion of macro ‘zeros’ for(int i=poz;i<=n;i+=zeros(i)) ^ user.cpp: In function ‘int query(int)’: user.cpp:2:27: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define zeros(x) (x^(x-1) & x) ^ user.cpp:16:27: note: in expansion of macro ‘zeros’ for(int i=poz;i>=1;i-=zeros(i)) ^ user.cpp: In function ‘int main()’: user.cpp:24:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inv.in","r",stdin); ^ user.cpp:25:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inv.out","w",stdout); ^ user.cpp:26:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:29:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i].first); ^