View Compilation Error

0_0_39527897_24395.cpp: In function 'void init()':
0_0_39527897_24395.cpp:23:5: error: 'memset' was not declared in this scope
   23 |     memset(dis, 0, sizeof(dis));
      |     ^~~~~~
0_0_39527897_24395.cpp:7:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    6 | #include<vector>
  +++ |+#include <cstring>
    7 | #define MAXN 500000+1