Compilare: user.cpp: In function ‘void update(long int, long int)’: user.cpp:11:22: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(;poz<=n;poz+=poz&(poz-1)^poz) ^ user.cpp: In function ‘long int query(long int)’: user.cpp:17:21: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(;poz>0;poz-=poz&(poz-1)^poz) ^ user.cpp: In function ‘int main()’: user.cpp:37:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.in","r",stdin); ^ user.cpp:38:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("schi.out","w",stdout); ^ user.cpp:40:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ user.cpp:44:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&a[i]); ^