View Compilation Error

0_0_39352642_28154.cpp: In function 'void init()':
0_0_39352642_28154.cpp:11:9: error: 'memset' was not declared in this scope
   11 |         memset(fl, -1, sizeof(fl));
      |         ^~~~~~
0_0_39352642_28154.cpp:4:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include<cmath>
  +++ |+#include <cstring>
    4 | using namespace std;