Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:3:18: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define lp2(x) (x&(x-1)^x) ^ user.cpp:12:26: note: in expansion of macro ‘lp2’ for( ; p <= n ; p += lp2(p)) ^ user.cpp: In function ‘int query(int)’: user.cpp:3:18: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define lp2(x) (x&(x-1)^x) ^ user.cpp:20:21: note: in expansion of macro ‘lp2’ for( ; p ; p -= lp2(p)) ^ user.cpp: In function ‘int main()’: user.cpp:55:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aib.in" , "r" , stdin); ^ user.cpp:56:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aib.out", "w", stdout); ^ user.cpp:59:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:65:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&tmp); ^ user.cpp:72:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&op); ^ user.cpp:78:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ user.cpp:84:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ user.cpp:90:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a); ^