View Compilation Error

0_0_39573430_20710.cpp: In function 'int main()':
0_0_39573430_20710.cpp:47:9: error: 'memset' was not declared in this scope
   47 |         memset(p, 0, sizeof(p));
      |         ^~~~~~
0_0_39573430_20710.cpp:4:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include <utility>
  +++ |+#include <cstring>
    4 | #define rep(i, l, r) for (int i = (l); i <= (r); i ++ )