View Compilation Error

0_0_39787858_2557.cpp: In function 'int main()':
0_0_39787858_2557.cpp:14:17: error: 'memset' was not declared in this scope
   14 |                 memset(graph,-1,sizeof(graph));
      |                 ^~~~~~
0_0_39787858_2557.cpp:4:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    3 | #include<map>
  +++ |+#include <cstring>
    4 | using namespace std;