View Compilation Error

0_0_39062713_27778.cpp: In member function 'int Stage::hash()':
0_0_39062713_27778.cpp:13:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   13 |         sort(p, p + 4);
      |         ^~~~
      |         short
0_0_39062713_27778.cpp: In function 'bool bfs(Stage, Stage)':
0_0_39062713_27778.cpp:38:17: error: 'memset' was not declared in this scope
   38 |                 memset(mp, 0, sizeof mp);
      |                 ^~~~~~
0_0_39062713_27778.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include<unordered_set>
  +++ |+#include <cstring>
    5 | using namespace std;