Compilare: user.cpp: In function ‘int main()’: user.cpp:191:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size(); i++) ^ user.cpp:207:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s.size(); j++) ^ user.cpp:246:47: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] pair <int, int > p = query(T, poz - k + 1, poz, 1, nr); ^