Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:5:10: warning: statement has no effect [-Wunused-value] for(poz; poz <= n; poz += poz & -poz) ^ user.cpp: In function ‘int query(int)’: user.cpp:10:10: warning: statement has no effect [-Wunused-value] for(poz; poz > 0; poz -= poz & -poz) ^ user.cpp: In function ‘int main()’: user.cpp:34:35: 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:35:37: 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:36:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:39:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^