View Compilation Error

0_0_38858137_22305.cpp: In function 'void solve()':
0_0_38858137_22305.cpp:104:9: error: 'memset' was not declared in this scope
  104 |         memset(book, 0, sizeof(book));
      |         ^~~~~~
0_0_38858137_22305.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include <queue>
  +++ |+#include <cstring>
    5 | using namespace std;
0_0_38858137_22305.cpp: In function 'int main()':
0_0_38858137_22305.cpp:115:17: error: 'memset' was not declared in this scope
  115 |                 memset(mp, 0, sizeof(mp));
      |                 ^~~~~~
0_0_38858137_22305.cpp:115:17: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?