Compilare: main.cpp: In function 'void inser(long long int)': main.cpp:20:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<M[poz].size();i++) ~^~~~~~~~~~~~~~ main.cpp:27:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<N[poz1].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int query(long long int)': main.cpp:36:7: warning: unused variable 'u' [-Wunused-variable] int u=0,u1=0; ^ main.cpp:36:11: warning: unused variable 'u1' [-Wunused-variable] int u=0,u1=0; ^~