View Compilation Error

0_0_39355055_905.cpp: In function 'int main()':
0_0_39355055_905.cpp:151:17: error: 'memset' was not declared in this scope
  151 |                 memset(ok,0,sizeof(ok));
      |                 ^~~~~~
0_0_39355055_905.cpp:3:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<cstdio>
  +++ |+#include <cstring>
    3 | using namespace std;