View Compilation Error

0_0_38967618_2196.cpp: In function 'void init()':
0_0_38967618_2196.cpp:58:5: error: 'memset' was not declared in this scope
   58 |     memset(T, -1, sizeof T);
      |     ^~~~~~
0_0_38967618_2196.cpp:2:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include<iostream>
  +++ |+#include <cstring>
    2 | #define ll long long