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0_0_39180947_17800.cpp: In function 'int main()':
0_0_39180947_17800.cpp:69:9: error: 'cin' was not declared in this scope
   69 |         cin>>T;
      |         ^~~
0_0_39180947_17800.cpp:5:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    4 | #include<queue>
  +++ |+#include <iostream>
    5 | using namespace std;
0_0_39180947_17800.cpp:81:17: error: 'cout' was not declared in this scope
   81 |                 cout<<bfs()<<endl;
      |                 ^~~~
0_0_39180947_17800.cpp:81:17: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39180947_17800.cpp:81:30: error: 'endl' was not declared in this scope
   81 |                 cout<<bfs()<<endl;
      |                              ^~~~
0_0_39180947_17800.cpp:5:1: note: 'std::endl' is defined in header '<ostream>'; did you forget to '#include <ostream>'?
    4 | #include<queue>
  +++ |+#include <ostream>
    5 | using namespace std;