View Compilation Error

0_0_39211435_23761.cpp: In function 'double solve()':
0_0_39211435_23761.cpp:77:5: error: 'memset' was not declared in this scope
   77 |     memset(Tag,0,sizeof(Tag));
      |     ^~~~~~
0_0_39211435_23761.cpp:4:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include <iomanip>
  +++ |+#include <cstring>
    4 | #define ll long long int