Compilare: user.cpp: In function ‘long long unsigned int isprim(long long unsigned int)’: user.cpp:23:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=3;i*i<=k;i=i+2) ^ user.cpp: In function ‘long long unsigned int pinex()’: user.cpp:64:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<nr;j++) ^ user.cpp: In function ‘int main()’: user.cpp:79:37: warning: variable ‘b1’ set but not used [-Wunused-but-set-variable] long long unsigned int m, i, b, b1, r, j, d, sol; ^ user.cpp:79:41: warning: unused variable ‘r’ [-Wunused-variable] long long unsigned int m, i, b, b1, r, j, d, sol; ^ user.cpp:79:44: warning: unused variable ‘j’ [-Wunused-variable] long long unsigned int m, i, b, b1, r, j, d, sol; ^ user.cpp:79:47: warning: unused variable ‘d’ [-Wunused-variable] long long unsigned int m, i, b, b1, r, j, d, sol; ^