Compilare: user.cpp: In function ‘int main()’: user.cpp:24:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; (1 << j) <= n / k; ++j) ^ user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; (1 << j) <= numar - 2; ++j) ^ user.cpp:34:25: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if (((1 << j)& numar-2) > 0) nr1 = (nr1*p) % numar; ^