View Compilation Error

0_0_38807472_10309.cpp: In function 'void init()':
0_0_38807472_10309.cpp:35:5: error: 'memset' was not declared in this scope
   35 |     memset(vis, 0, sizeof(vis));
      |     ^~~~~~
0_0_38807472_10309.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include <functional>
  +++ |+#include <cstring>
    5 | #include <vector>