View Compilation Error

0_0_39450776_8909.cpp: In function 'void solve()':
0_0_39450776_8909.cpp:42:5: error: 'unordered_set' was not declared in this scope
   42 |     unordered_set<ull> A;
      |     ^~~~~~~~~~~~~
0_0_39450776_8909.cpp:4:1: note: 'std::unordered_set' is defined in header '<unordered_set>'; did you forget to '#include <unordered_set>'?
    3 | #include <set>
  +++ |+#include <unordered_set>
    4 | using namespace std;
0_0_39450776_8909.cpp:42:22: error: expected primary-expression before '>' token
   42 |     unordered_set<ull> A;
      |                      ^
0_0_39450776_8909.cpp:42:24: error: 'A' was not declared in this scope
   42 |     unordered_set<ull> A;
      |                        ^