Compilare: user.cpp: In function ‘void print_primes()’: user.cpp:63:9: warning: unused variable ‘count’ [-Wunused-variable] int count = 0; ^ user.cpp: In function ‘void generate_divs()’: user.cpp:82:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (start < q.size()) ^ user.cpp: In function ‘void really_solve()’: user.cpp:123:10: warning: variable ‘is_there_a_one’ set but not used [-Wunused-but-set-variable] bool is_there_a_one = 0; ^ user.cpp:124:10: warning: variable ‘are_all_primes’ set but not used [-Wunused-but-set-variable] bool are_all_primes = 1; ^