Compilare: user.cpp: In function ‘void build(int, int, int)’: user.cpp:23:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<A[2*nod].size() && j<A[2*nod+1].size()){ ^ user.cpp:23:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<A[2*nod].size() && j<A[2*nod+1].size()){ ^ user.cpp:29:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<A[2*nod].size();i++) ^ user.cpp:31:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;j<A[2*nod+1].size();j++) ^ user.cpp: In function ‘int query3(int, int)’: user.cpp:67:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<=u && u>=0 && p<=A[nod].size()){ ^ user.cpp: In function ‘int query4(int, int)’: user.cpp:80:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<=u && u>=0 && p<=A[nod].size()){ ^ user.cpp: In function ‘int main()’: user.cpp:105:20: warning: unused variable ‘j’ [-Wunused-variable] register int i,j,x1,y1,x2,y2; ^