Compilare: main.cpp: In function 'void add(int, int)': main.cpp:18:19: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses] #define zeros(x) x&(x-1)^x ^ main.cpp:27:25: note: in expansion of macro 'zeros' for (;pos<=n;pos += zeros(pos)) AIB[pos] += val; ^~~~~ main.cpp: In function 'int main()': main.cpp:47:33: 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); ^ main.cpp:48:35: 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); ^