View Compilation Error

0_0_39527122_25563.cpp: In function 'void init(int)':
0_0_39527122_25563.cpp:11:9: error: 'memset' was not declared in this scope
   11 |         memset(isnp,false,sizeof(isnp));
      |         ^~~~~~
0_0_39527122_25563.cpp:3:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<vector>
  +++ |+#include <cstring>
    3 | using namespace std;