Compilare: main.cpp: In function 'bool divide(long long unsigned int, long long int)': main.cpp:16:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (hatz <= (1LL<<(2 * c))) ~~~~~^~~~~~~~~~~~~~~~~ main.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (hatz <= (1LL<<(2 * c)) * 3) ~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'long long unsigned int divide2(bool, long long unsigned int, long long int)': main.cpp:27:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (l <= (1LL<<(2 * c))) ~~^~~~~~~~~~~~~~~~~ main.cpp:29:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (l <= 2 * (1LL << (2 * c))) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:31:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (l <= 3 * (1LL << (2 * c))) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < k; ++i) ~~^~~ main.cpp:60:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((1LL<<(2 * (x + 1))) <= lmao) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~