Compilare: user.cpp: In function ‘int main()’: user.cpp:55:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr[i].size() > max1) ^ user.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr[i].size() > max2 && dr[i].size() < max1) ^ user.cpp:57:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dr[i].size() > max2 && dr[i].size() < max1) ^ user.cpp:38:18: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] lv[p].pop_back(); ^