View Compilation Error

0_0_38778710_4212.cpp: In function 'int main()':
0_0_38778710_4212.cpp:60:17: error: 'memset' was not declared in this scope
   60 |                 memset(in, 0, sizeof(in));
      |                 ^~~~~~
0_0_38778710_4212.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;