View Compilation Error

0_0_39535059_17902.cpp: In function 'void _init()':
0_0_39535059_17902.cpp:16:5: error: 'memset' was not declared in this scope
   16 |     memset(hd,-1,sizeof(hd));
      |     ^~~~~~
0_0_39535059_17902.cpp:4:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include<set>
  +++ |+#include <cstring>
    4 | using namespace std;