Compilare: main.cpp: In function 'void bkt(long long int, int, long long int)': main.cpp:21:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Prime>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | if(id == desc.size()){ | ~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:7: warning: unused variable 'i' [-Wunused-variable] 37 | int i, b; | ^