View Compilation Error

0_0_38960412_18134.cpp: In function 'void init()':
0_0_38960412_18134.cpp:18:5: error: 'memset' was not declared in this scope
   18 |     memset(b, 1, sizeof(b));
      |     ^~~~~~
0_0_38960412_18134.cpp:8:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    7 | #include<algorithm>;
  +++ |+#include <cstring>
    8 | using namespace std;