Compilare: user.cpp: In function ‘int verif(int)’: user.cpp:25:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (l>v[1].size())return 0; // nu exista in v[1] o sub de lungime l ^ user.cpp:27:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[1].size(); i++) ^ user.cpp:28:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i+l-1 < v[1].size()) ^ user.cpp:43:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz>=0 && poz<v[i].size()) cnt++; ^