Compilare: user.cpp: In function ‘int main()’: user.cpp:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (lgP < T.size()) fout << "0\n"; ^ user.cpp:58:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < s.size() && i < 1000; i++) fout << s[i] << ' '; ^