Compilare: user.cpp: In function ‘int main()’: user.cpp:33:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<s.size(); i++) ^ user.cpp:34:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i+l-1 < s.size()) ^ user.cpp:65:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz>=0 && poz<v[i].size()) ^ user.cpp:100:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz>=0 && poz<v[n].size()) ^