View Compilation Error

0_0_39317866_28204.cpp: In function 'int main()':
0_0_39317866_28204.cpp:21:9: error: 'cin' was not declared in this scope
   21 |   while(cin>>n>>m)
      |         ^~~
0_0_39317866_28204.cpp:2:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    1 | #include<string>
  +++ |+#include <iostream>
    2 | using namespace std;
0_0_39317866_28204.cpp:38:4: error: 'cout' was not declared in this scope
   38 |    cout<<count-1<<endl;
      |    ^~~~
0_0_39317866_28204.cpp:38:4: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39317866_28204.cpp:38:19: error: 'endl' was not declared in this scope
   38 |    cout<<count-1<<endl;
      |                   ^~~~
0_0_39317866_28204.cpp:2:1: note: 'std::endl' is defined in header '<ostream>'; did you forget to '#include <ostream>'?
    1 | #include<string>
  +++ |+#include <ostream>
    2 | using namespace std;