View Compilation Error

0_0_39042295_6515.cpp: In function 'int main()':
0_0_39042295_6515.cpp:45:9: error: 'memset' was not declared in this scope
   45 |         memset(head, -1, sizeof(head));
      |         ^~~~~~
0_0_39042295_6515.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include<queue>
  +++ |+#include <cstring>
    5 |