Compilare: main.cpp: In function 'bool eok(int)': main.cpp:26:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return cate >= 1ll * x * k; ~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 0; i < n; i++) ~~^~~