View Compilation Error

0_0_39280839_6614.cpp: In function 'void solve()':
0_0_39280839_6614.cpp:30:9: error: 'memset' was not declared in this scope
   30 |         memset(R, 0, sizeof(R));
      |         ^~~~~~
0_0_39280839_6614.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include <algorithm>
  +++ |+#include <cstring>
    5 | using namespace std;