answer.code: In function ‘int richest(int, int, int)’:
answer.code:14:17: error: ‘memset’ was not declared in this scope
   14 |                 memset(cnt, 0, sizeof cnt);
      |                 ^~~~~~
answer.code:2:1: note: ‘memset’ is defined in header ‘<cstring>’; did you forget to ‘#include <cstring>’?
    1 | #include "richest.h"
  +++ |+#include <cstring>
    2 | using namespace std;
answer.code:19:1: warning: control reaches end of non-void function [-Wreturn-type]
   19 | }
      | ^