Compilare: user.cpp: In function ‘void citire()’: user.cpp:14:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int i = 1; i <= n; i ++) ^ user.cpp: In function ‘int r2(int, int)’: user.cpp:30:9: warning: unused variable ‘pd’ [-Wunused-variable] int pd = 0,pi = 0; ^ user.cpp:30:16: warning: unused variable ‘pi’ [-Wunused-variable] int pd = 0,pi = 0; ^