View Compilation Error

0_0_39580610_22355.cpp: In function 'int main()':
0_0_39580610_22355.cpp:14:17: error: 'memset' was not declared in this scope
   14 |                 memset(sum, 0, sizeof(sum));
      |                 ^~~~~~
0_0_39580610_22355.cpp:4:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include <cstdio>
  +++ |+#include <cstring>
    4 | using namespace std;