Compilare: user.cpp: In function ‘void update_AIB(int, int, int)’: user.cpp:17:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; pos <= V[where].size(); pos += pos & -pos) ^ user.cpp: In function ‘void set_sizes(int, int, int)’: user.cpp:38:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < AIB[nod].size(); ++i) ^ user.cpp:52:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < AIB[nod].size(); ++i) ^ user.cpp: In function ‘void update(int, int, int)’: user.cpp:69:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (step = 1; step <= V[nod].size(); step <<= 1); ^ user.cpp:71:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (where + step < V[nod].size() && V[nod][where + step] <= A[Ap]) ^ user.cpp: In function ‘void query(int, int, int)’: user.cpp:80:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (step = 1; step <= V[nod].size(); step <<= 1); ^ user.cpp:82:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (where + step < V[nod].size() && V[nod][where + step] <= Ap) ^