Compilare: main.cpp: In function 'void upd(int)': main.cpp:16:11: warning: statement has no effect [-Wunused-value] for (p; p <= n; p += lsb(p)) ^ main.cpp: In function 'int qry(int)': main.cpp:22:11: warning: statement has no effect [-Wunused-value] for (p; p; p -= lsb(p)) ^ main.cpp: In function 'int main()': main.cpp:28:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bisortare.in", "r", stdin); ^ main.cpp:29:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bisortare.out", "w", stdout); ^