Compilare: main.cpp: In function 'void upd(int, int, int, int)': main.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=py;j<aib[ind][i].size();j+=lsb(j)) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:15: warning: unused variable 't' [-Wunused-variable] long long t,n,m,i; ^ main.cpp:61:19: warning: unused variable 'm' [-Wunused-variable] long long t,n,m,i; ^