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0_0_38698878_32296.cpp: In function 'bool bfs()':
0_0_38698878_32296.cpp:22:5: error: 'memset' was not declared in this scope
   22 |     memset(d,-1,sizeof(d));
      |     ^~~~~~
0_0_38698878_32296.cpp:3:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<algorithm>
  +++ |+#include <cstring>
    3 | using namespace std;
0_0_38698878_32296.cpp: In function 'void solve()':
0_0_38698878_32296.cpp:66:5: error: 'memset' was not declared in this scope
   66 |     memset(p,0,sizeof(p));
      |     ^~~~~~
0_0_38698878_32296.cpp:66:5: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?