View Compilation Error

0_0_39022853_2838.cpp: In function 'void add(int)':
0_0_39022853_2838.cpp:8:5: error: 'memset' was not declared in this scope
    8 |     memset(a,0,sizeof a);
      |     ^~~~~~
0_0_39022853_2838.cpp:3:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<algorithm>
  +++ |+#include <cstring>
    3 | using namespace std;