Compilare: user.cpp: In member function ‘void aib_max::update(int, int)’: user.cpp:25:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( ; p < buf.size(); p += (p+1)&(-p-1)){ ^ user.cpp: In function ‘int main()’: user.cpp:53:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < valori.size(); ++i){ ^ user.cpp:54:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < valori[i].size(); ++j){ ^