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0_0_39471413_2138.cpp: In function 'PII bfs()':
0_0_39471413_2138.cpp:43:9: error: 'memset' was not declared in this scope
   43 |         memset(st, 0, sizeof(st));
      |         ^~~~~~
0_0_39471413_2138.cpp:3:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    2 | #include<queue>
  +++ |+#include <cstring>
    3 | //#include<map>
0_0_39471413_2138.cpp: In function 'int main()':
0_0_39471413_2138.cpp:84:17: error: 'memset' was not declared in this scope
   84 |                 memset(h, -1, sizeof(h));
      |                 ^~~~~~
0_0_39471413_2138.cpp:84:17: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?