Compilare: main.cpp: In function 'void solve()': main.cpp:18:33: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'long long unsigned int' [-Wsign-compare] 18 | while(prime[ind]*prime[ind] <= b && ind < prime.size()){ main.cpp:18:45: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | while(prime[ind]*prime[ind] <= b && ind < prime.size()){ | ~~~~^~~~~~~~~~~~~~