Compilare: main.cpp: In function 'long long int no_name_with_no_understanding(long long unsigned int)': main.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned long long i = 1; i < (1ll << prime_divisors.size()); i++) { ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (no_name_with_no_understanding(mid) >= required_numerator) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~