View Compilation Error

0_0_39052026_29103.cpp: In function 'int main()':
0_0_39052026_29103.cpp:8:11: error: 'cin' was not declared in this scope
    8 |     while(cin>>n>>m){
      |           ^~~
0_0_39052026_29103.cpp:3:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    2 | #include<string>
  +++ |+#include <iostream>
    3 | using namespace std;
0_0_39052026_29103.cpp:12:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   12 |         sort(A+ 0,A+n+m);
      |         ^~~~
      |         short
0_0_39052026_29103.cpp:21:9: error: 'cout' was not declared in this scope
   21 |         cout<<B[0];
      |         ^~~~
0_0_39052026_29103.cpp:21:9: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
0_0_39052026_29103.cpp:24:15: error: 'endl' was not declared in this scope
   24 |         cout<<endl;
      |               ^~~~
0_0_39052026_29103.cpp:3:1: note: 'std::endl' is defined in header '<ostream>'; did you forget to '#include <ostream>'?
    2 | #include<string>
  +++ |+#include <ostream>
    3 | using namespace std;