Compilare: user.cpp: In function ‘int NrSec(int)’: user.cpp:14:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < V.size() && j < k){ ^ user.cpp:24:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < V.size() && j < V.size()){ ^ user.cpp:24:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < V.size() && j < V.size()){ ^ user.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < V.size() && H[V[j]] > 1){ ^