View Compilation Error

0_0_39604331_25566.cpp: In function 'int main()':
0_0_39604331_25566.cpp:31:17: error: 'memset' was not declared in this scope
   31 |                 memset(hd,0,sizeof(hd));
      |                 ^~~~~~
0_0_39604331_25566.cpp:2:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include "cstdio"
  +++ |+#include <cstring>
    2 | typedef long long LL;