Compilare: user.cpp: In member function ‘void LargeNumber::operator+=(const LargeNumber&)’: user.cpp:20:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < max(v.size(), u.size()); ++i) { ^ user.cpp:21:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v.size() > i) ans[i] += v[i]; ^ user.cpp:22:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (u.size() > i) ans[i] += u[i]; ^ user.cpp: In member function ‘void LargeNumber::operator*=(const LargeNumber&)’: user.cpp:34:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) ^ user.cpp:35:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < u.size(); ++j) ^ user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < ans.size(); ++i) { ^