View Compilation Error

0_0_39048952_23154.cpp: In function 'int main()':
0_0_39048952_23154.cpp:39:11: error: 'cin' was not declared in this scope
   39 |     while(cin>>n)
      |           ^~~
0_0_39048952_23154.cpp:2:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    1 | #include<cstring>
  +++ |+#include <iostream>
    2 | 
0_0_39048952_23154.cpp:50:9: error: 'cout' was not declared in this scope
   50 |         cout<<max1<<"\n";
      |         ^~~~
0_0_39048952_23154.cpp:50:9: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?