Compilare: user.cpp: In function ‘void build(int, int, int)’: user.cpp:23:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<a[2*nod].size()&&j<a[2*nod+1].size()) ^ user.cpp:23:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<a[2*nod].size()&&j<a[2*nod+1].size()) ^ user.cpp:32:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i<a[2*nod].size();i++) ^ user.cpp:34:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;j<a[2*nod+1].size();j++) ^ user.cpp: In function ‘void query(int, int, int, int, int)’: user.cpp:41:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(pas=1;2*pas<=a[nod].size();pas*=2); ^ user.cpp:43:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+pas<a[nod].size()) ^ user.cpp:47:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(pas=1;2*pas<=a[nod].size();pas*=2); ^ user.cpp:49:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+pas<a[nod].size()) ^