Compilare: user.cpp: In function ‘int main()’: user.cpp:34:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (N - radical * radical <= radical && radical * radical != N) ^ user.cpp:34:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (N - radical * radical <= radical && radical * radical != N) ^ user.cpp:36:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (N - radical * radical > radical) ^