Compilare: main.cpp: In function 'int findpos(int)': main.cpp:32:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | while (d < prime.size() && prime[d] * prime[d] <= x) { | ~~^~~~~~~~~~~~~~ main.cpp: In function 'void ins(int)': main.cpp:51:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | while (d < prime.size() && prime[d] * prime[d] <= x) { | ~~^~~~~~~~~~~~~~