Compilare: main.cpp: In function 'void euler(int, int)': main.cpp:45:23: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | while (prima_m[x] < a[x].size()) { main.cpp: In function 'int main()': main.cpp:83:28: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 83 | if (c_euler.size() == m) { | ~~~~~~~~~~~~~~~^~~~